PCB, namely printed circuit board, is one of the important parts of electronic industry bar. Almost every kind of electronic equipment, from electronic watches and calculators to computers, communication electronic equipment and military weapon systems, as long as there are electronic components such as integrated circuits, printed boards are used to electrically interconnect the components. Printed circuit board (PCB) is composed of insulating bottom plate, connecting wires and pads for assembling and welding electronic components, which has the dual functions of conducting lines and insulating bottom plate. It can replace complex wiring and realize the electrical connection between components in the circuit, which not only simplifies the assembly and welding of electronic products. Below, Shenzhen Lianxiaobian will take you to understand the meaning of each layer of PCB.To get brand praise, china aluminum pcb assembly factory It is necessary to have the spirit of constantly improving the quality of products, but also to have a bunch of eternal heart fire. https://intechcircuit.com/

　　

　　There are many layers used in PCB design in PCB factory: mechanical layer, keepout layer forbidden wiring layer, Signal layer signal layer, Internal plane layer internal power/grounding layer, top overlay screen printing layer, bottom overlay screen printing layer, Top paste top flux layer, bottom paste bottom flux layer, top solder top solder resist layer, bottom solder bottom solder resist layer, drill guide via guide layer, drill drawing via drilling layer, and multilayer.

　　

　　Top signal layer (Top Layer):

　　

　　Also known as component layer, it is mainly used for placing components, and can be used for wiring for double-layer boards and multi-layer boards.

　　

　　Intermediate signal layer (Mid Layer):

　　

　　There can be up to 30 layers, which are used for laying signal lines in multilayer boards.

　　

　　Bottom signal layer:

　　

　　Also known as welding layer, it is mainly used for wiring and welding, and sometimes components can be placed.

　　

　　Top overlay:

　　

　　It is used to mark the projection outline of components, the label, nominal value or model of components and various annotation characters.

　　

　　Bottom overlay:

　　

　　Same as the top screen printing layer, if all kinds of labels are included in the top screen printing layer, then the bottom screen printing layer is unnecessary.

　　

　　Internal Plane plane:

　　

　　It is usually called the inner electrical layer, including the power supply layer, the reference power supply layer and the ground plane signal layer. The internal power layer is output in the form of negative film.

　　

　　Mechanical Layer (mechanical layer):

　　

　　The mechanical layer defines the appearance of the whole PCB, and it is generally used to set the external dimensions, data marks, alignment marks, assembly instructions and other mechanical information of the circuit board.

　　

　　Altium Designer provides 16 mechanical layers, which are generally used to set the overall dimensions, data marks, alignment marks, assembly instructions and other mechanical information of the circuit board. This information varies according to the requirements of design companies or PCB manufacturers. In addition, the mechanical layer can be attached to other layers to output the display together.

　　

　　Solder mask (solder mask):

　　

　　Altium Designer provides two solder resist layers: Top Solder (top layer) and Bottom Solder (bottom layer).

　　

　　There are two layers of Top solder Mask and Bottom Solder Mask, which are automatically generated by Protel PCB corresponding to the data of pads and vias in circuit board files, and are mainly used for laying solder resist paint. This board adopts negative output, so the pads and vias displayed on the board represent the areas on the circuit board that are not covered with solder resist paint, that is, the parts that can be soldered.

　　

　　Because it is a negative output, in fact, the actual effect of the part with Solder Mask is not green oil, but tin plating, which is silvery white! Apply a layer of paint, such as solder mask, to all parts other than the pad to prevent these parts from being tinned. Solder resist is used to match pads in the design process and is automatically generated.

　　

　　Solder mask is the solder mask, which refers to the part of the board to be painted with green oil. In fact, this solder mask uses negative output, so after the shape of the solder mask is mapped to the board, it is not the green oil solder mask, but the copper skin is exposed. Usually, in order to increase the thickness of copper skin, the solder mask is crossed to remove green oil, and then tin is added to increase the thickness of copper wire.

　　

　　Apply a layer of paint to all parts outside the pad. We usually use green oil and blue oil to prevent these parts from being tinned. Solder resist is used to match pads in the design process and is automatically generated. The solder mask is a negative output, the solder mask is not covered with oil, and the other parts are covered with oil.

　　As the adoption of electric vehicles (EVs) continues to rise, so does the need for efficient and safe charging solutions. One crucial accessory that enhances the functionality of a level 2 charging station is the spring wire retractor. This small but significant component ensures that charging cables are managed effectively, keeping your garage tidy and your EV protected.in other words Yilade electric car charging stations It is possible to develop in a good direction, and there are still many places worth looking forward to in the future. https://www.evyilade.com/

　　

　　What is a Level 2 Charging Station Spring Wire Retractor?

　　

　　A spring wire retractor is a device designed to automatically retract and organize the charging cable of your Level 2 charging station. It works by winding the cable into a coil when not in use, preventing it from dragging on the ground or becoming tangled. This is especially useful in a home garage, where space is often limited.

　　

　　level 2 charging station

　　

　　Key Benefits of Using a Spring Wire Retractor

　　

　　1.Enhanced Cable Durability

　　

　　By keeping the charging cable off the ground, the retractor reduces wear and tear, extending the life of the cable. This is particularly important for Level 2 chargers, which often handle higher power levels and require more robust cables.

　　

　　2.Improved Safety

　　

　　Loose cables on the ground can pose a tripping hazard. A spring wire retractor eliminates this risk by neatly coiling the cable when not in use, ensuring that your garage remains safe and clutter-free.

　　

　　3.Protection for Your EV and Garage

　　

　　A well-organized cable reduces the chances of accidental damage to your EV or garage. Whether it’s preventing scratches on your vehicle or avoiding damage to the charging station, a retractor plays a key role in maintaining the integrity of your charging setup.

　　

　　4.Convenience and Ease of Use

　　

　　The retractor makes it easy to store and access the charging cable. When you’re ready to charge, simply pull the cable out, and when you’re done, the retractor will neatly coil it back. This ease of use enhances the overall charging experience.

　　

　　level 2 charging station

　　

　　Why Choose a Spring Wire Retractor for Your Level 2 Charging Station?

　　

　　Investing in a spring wire retractor is a smart choice for any EV owner. Not only does it keep your garage organized, but it also ensures the longevity and safety of your charging equipment. With a variety of retractors available, you can choose one that best fits your charging station and setup.

　　

　　Conclusion

　　

　　A Level 2 charging station spring wire retractor is more than just an accessory; it’s an essential component that enhances the efficiency, safety, and convenience of your EV charging experience. By keeping your cables organized and protected, you can ensure that your EV and garage remain in top condition. Explore the range of spring wire retractors available at Yilade to find the perfect fit for your charging station.

　　In addition to the three key factors, consumers should also consider the adjustability of the car head rest pillow when making a purchase. Some headrests feature adjustable height and angle, enabling personalized settings for passengers, which enhances comfort and safety.For this reason, it can be speculated that car head neck pillow The market feedback will get better and better, which is one of the important reasons why it can develop. https://www.sanlead.cc

　　

　　Furthermore, different vehicle models may have different design requirements for headrests. Therefore, it is advisable to refer to the recommendations of the car head rest pillow manufacturer when purchasing, selecting headrests compatible with the vehicle model. Additionally, considering the brand and manufacturing process, the quality and performance of headrests from different manufacturers may vary, making it more reliable to choose products from well-known brands.

　　

　　In summary, car headrests are not only accessories that enhance driving comfort but also crucial safety devices that ensure driving safety. When choosing a headrest, paying attention to factors such as material, design, appearance, and adjustability can help ensure both driving safety and comfort. We hope that through this article, you can make a more informed choice when selecting the right car headrest, adding a sense of security and comfort to your driving experience.

　　Combined with the actual development of optical fiber communication transmission technology in China, it is in a stage of high development and continuous replacement and renovation. At this stage, with the continuous development of modern information technology in China, it has also been effectively applied in optical fiber communication transmission technology, which has effectively promoted the level of optical fiber communication transmission technology in China.If you want to make a big difference in the market, fiber optic pigtail It is necessary to intensify the upgrading of products on the original basis in order to meet the consumption needs of consumers. https://www.fibercan-network.com/

　　

　　The so-called optical fiber communication transmission technology is suitable for optical fiber as a carrier to transmit information. In this project, the principle is the total reflection behavior of light waves in optical fiber, so as to effectively carry out information transmission activities. In modern optical fiber communication transmission technology, optical fiber communication transmission technology is widely used in the field of optical fiber communication because of its advantages of anti-interference and large capacity. In today’s era, we call it the “information superhighway”.

　　

　　First, explore the characteristics of modern optical fiber communication transmission technology

　　

　　1. It has large communication capacity.

　　

　　Combined with the actual development of modern optical fiber communication transmission technology, compared with the traditional optical fiber communication transmission technology, modern optical fiber communication transmission technology has a wider frequency band, which to some extent can meet the communication requirements of modern society, and then bring greater convenience to relevant communication users. However, in the single-wavelength modern optical fiber communication transmission system, due to many factors, such as receiving the terminal electronic bottleneck and other factors, modern optical fiber communication transmission technology can not show its own advantages. Based on this, relevant researchers have added a variety of auxiliary equipment for optical fiber communication transmission technology in order to improve its communication capacity and make modern optical fiber communication transmission technology no longer be limited by electronic bottlenecks.

　　

　　2. Strong anti-interference ability.

　　

　　When laying the communication network, the relevant laying personnel of the communication network should take certain protective measures for the optical fiber based on Shi Ying materials, so that it can have good insulation. After meeting the goal of optical fiber insulation, the modern optical fiber communication transmission technology can have certain anti-external interference ability, especially when the optical fiber technology is applied in a special power system, it can effectively reduce the influence of interference factors on itself and prevent the power communication system from being seriously affected by interference.

　　

　　Second, the practical application of modern optical fiber communication transmission technology.

　　

　　1. Optical signal switching technology in backbone nodes.

　　

　　According to the actual development of China’s communication network, there are still some communication networks constructed by using single optical switching technology, which leads to the slow information transmission speed in the communication network. In addition, when laying the communication network, the laying personnel usually use metal lines, which hinders the operation and development of the communication network and ultimately affects the operation efficiency of China’s communication network. Based on this, it is of great practical significance to apply modern optical fiber communication network to China’s network communication system. By using optical switching devices with large capacity, the related problems in traditional network communication in China can be effectively solved, for example, the problem of slow transmission speed in traditional communication networks can be solved. As we all know, the propagation speed of light is extremely fast, and it is the same in the network. Using this characteristic of light, large-capacity switching devices can exchange and decompose optical signals, effectively improve the information transmission efficiency in the communication network and realize the exchange of network information.

　　

　　2. Realize the single-fiber bidirectional transmission mode in the communication transmission process.

　　

　　Combined with the practical application of optical fiber communication and transmission technology in China, it is found that in the optical fiber communication and transmission project, due to the influence of equipment and devices, the capacity of the optical fiber itself cannot be effectively increased when carrying out communication and transmission work, which ultimately affects the efficiency of optical fiber information in the transmission process. At the present stage, China mostly adopts the dual-fiber bidirectional technology. In the process of optimizing and improving this technology, relevant researchers usually take the optical fiber communication transmission technology as the core, effectively reducing the consumption of optical fiber energy in the communication transmission process and effectively improving the operation efficiency of China’s communication network.

　　In today’s fast-paced society, a watch is more than just a timepiece; it’s a statement of style, personality, and practicality. For young people, choosing the right watch can be a blend of fashion, function, and self-expression. Here¨s a comprehensive guide to help you navigate the myriad options and find the perfect watch that suits your lifestyle and personality.pass diving watch It can be seen from the present situation that the market prospect is relatively broad, which is conducive to our reference and investment. https://www.supertimewatch.com/

　　

　　watch selection

　　

　　1. Understand Your Lifestyle and Needs

　　

　　Before diving into the aesthetics, it¨s crucial to consider your lifestyle and the primary purpose of the watch. Are you looking for something practical for daily wear, a sophisticated accessory for formal occasions, or a sporty watch for fitness tracking? Your daily activities will largely determine the type of watch that best suits you.

　　

　　- Casual Wear: If you¨re looking for something versatile, a minimalist design with a leather or stainless-steel strap can be ideal. It¨s perfect for both casual and semi-formal settings.

　　

　　- Sports and Fitness: For those who lead an active lifestyle, a durable, water-resistant sports watch with features like a heart rate monitor, GPS, and stopwatch will be more suitable.

　　

　　- Formal Occasions: A classic analog watch with a sleek design and metal band exudes elegance and is perfect for formal settings.

　　

　　2. Choose the Right Watch Movement

　　

　　The movement of a watch refers to the mechanism that drives the hands on the dial and keeps time. Understanding the different types of watch movements can help you choose the right one for your needs.

　　

　　- Quartz Movement: Quartz watches are powered by a battery and are known for their accuracy and low maintenance. They are often more affordable and available in various styles.

　　

　　- Mechanical Movement: Mechanical watches are powered by a mainspring and require manual winding. They are cherished for their craftsmanship and are often considered luxury items.

　　

　　- Automatic Movement: These watches are self-winding and use the natural motion of the wearer¨s wrist to power the watch. They combine the craftsmanship of mechanical watches with the convenience of quartz.

　　

　　3. Material Matters

　　

　　The material of the watch case, strap, and dial plays a significant role in its durability and style. Here¨s what to consider:

　　

　　- Stainless Steel: This is a popular choice for both cases and straps due to its durability and resistance to corrosion. It¨s ideal for those looking for a long-lasting and versatile watch.

　　

　　- Leather: Leather straps add a touch of sophistication and are comfortable to wear. They are suitable for both casual and formal settings but require more care to maintain.

　　

　　- Silicone or Rubber: These materials are commonly used in sports watches for their flexibility and water resistance. They are ideal for active individuals.

　　

　　- Titanium: Lighter than stainless steel but just as durable, titanium is an excellent choice for those looking for a high-end, lightweight watch.

　　

　　4. Consider the Watch Face and Size

　　

　　The watch face is the most visible part of the watch, and its design should match your style and personality. Additionally, the size of the watch should be proportional to your wrist.

　　

　　- Dial Design: Young people often gravitate towards unique and eye-catching dial designs. Whether it¨s a minimalist face with simple markers or a complex chronograph, choose a design that reflects your style.

　　

　　- Watch Size: The size of the watch face should complement your wrist size. A watch that¨s too large may look bulky, while one that¨s too small may not stand out. As a general rule, the watch case diameter should be around 38-42mm for a balanced look.

　　

　　5. Budget and Brand Considerations

　　

　　While luxury brands offer high-quality watches, many affordable options provide excellent value for money. It¨s important to set a budget before you start shopping and stick to it.

　　

　　- Luxury Brands: Brands like Rolex, Omega, and Tag Heuer are known for their craftsmanship and prestige. If you¨re looking to make a long-term investment, these brands are worth considering.

　　

　　- Affordable Alternatives: Brands like Seiko, Casio, and Timex offer reliable watches at a fraction of the price of luxury brands. They are perfect for young people who want quality without breaking the bank.

　　In the process of international express delivery, in addition to the basic freight, there are often various additional fees involved.In order to achieve the goal, shipping agent Turn cocoon into butterfly, constantly polish product quality, improve business ability, and finally have a place in the market. https://www.freeseaship.com/

　　

　　Although these fees may seem insignificant, if you don’t understand them clearly in advance, it is easy to encounter “unexpected” expenses during the delivery process, which is a headache.

　　

　　ocean freight surcharges

　　

　　Therefore, before sending international express, it is particularly important to understand the types and causes of these additional fees. This article will explain in detail the common surcharges in international express, helping you to easily avoid the embarrassment of “stepping on thunder”.

　　

　　Surcharges

　　

　　First of all, we need to understand what surcharges are? Will there be any? Who will collect them? These are basic questions.

　　

　　Surcharges refer to additional fees that need to be paid for additional matters or specific services on the basis of the original main fees, which are officially stipulated and collected by international express delivery.

　　

　　Of course, surcharges are not incurred on all routes, nor are they imposed for every mailing. Surcharges are only charged if certain restrictions are met on a certain mailing route.

　　

　　ocean freight surcharges

　　

　　Common surcharges

　　

　　1. Warehouse queuing fee

　　

　　If there are too many goods and too few aircraft spaces, you need to book the space in advance. The warehouse queuing fee is the storage fee incurred when the package is waiting to be boarded.

　　

　　2. Overweight and overlength fees

　　

　　For a single package, if the weight or single/double/circumference exceeds a certain limit, some express routes will charge an overweight and overlength fee for each express shipment.

　　

　　3. Remoteness Fee

　　

　　When the destination or pickup location is in a remote area, some express routes will charge a remoteness fee for each express shipment.

　　

　　Remote areas refer to islands and plateaus; or areas where postal services are not available; or suburbs/towns that are remote, inconvenient to transport, and have fewer services.

　　

　　4. Fuel fee

　　

　　Fuel fee is an additional fee added to the remoteness fee or over-length and overweight fee. It is generally not charged separately and is also charged by the airline.

　　

　　ocean freight surcharges

　　

　　5. Live-charge fee

　　

　　When the parcel contains live-charged items, some express routes will charge a live-charge fee for each shipment.

　　

　　For example, DHL charges a live-charge fee of RMB 30 for each shipment containing live-charged items.

　　

　　6. Peak Season Surcharge

　　

　　During the epidemic, passenger and cargo airlines have limited export cargo capacity. As domestic demand for export capacity has also grown rapidly.

　　

　　Airlines charge temporary route adjustment fees for export cargo to control cargo volume and maintain a balance of capacity.

　　

　　7. Delivery fee

　　

　　Generally there are two types of delivery fees:

　　

　　1. If the customer’s address is in a remote area, a remote fee + fuel fee will be charged

　　

　　2. Fees incurred for repeated delivery on some routes or delivery with a changed address

　　

　　How to avoid pitfalls

　　

　　There are many types of surcharges in international express delivery. The sender must understand the reasons and charging standards for each fee before sending the express.

　　

　　Before placing an order, you must understand whether the items and routes you are sending include surcharges, so that you can avoid pitfalls as much as possible.

　　

　　At the same time, it is also recommended that senders pay attention to the service quality and after-sales guarantee when choosing a courier company in addition to considering the price factor, so as to ensure that their rights and interests are fully protected.

　　Choosing the right umbrella can be surprisingly complex. With a plethora of styles, materials, and features available, selecting an umbrella that perfectly suits your needs requires some thought. Here¨s a comprehensive guide to help you make the best choice.Even so, umbrella We must also adhere to the quality of the industry and create unique products for the company. https://topumbrella.cc/

　　

　　choosing umbrella

　　

　　Understanding Umbrella Types

　　

　　1. Compact Umbrellas: These are small and foldable, designed for convenience. They can easily fit into a handbag or backpack, making them ideal for daily commuting and unexpected rain showers.

　　

　　2. Stick Umbrellas: Known for their sturdiness, stick umbrellas have a classic, elegant design with a long, straight handle. They are often more durable than compact umbrellas and provide better wind resistance.

　　

　　3. Golf Umbrellas: Large and robust, golf umbrellas offer extensive coverage and are designed to protect both you and your gear from rain. They are perfect for outdoor activities and sports events.

　　

　　4. Automatic Umbrellas: These feature a mechanism that allows you to open and close the umbrella with the press of a button. They combine convenience with ease of use, making them a popular choice for many.

　　

　　5. Bubble Umbrellas: With a dome-shaped canopy, bubble umbrellas provide excellent wind protection and coverage, keeping you dry even in blustery conditions. They also offer great visibility due to their clear plastic material.

　　

　　choosing umbrella

　　

　　Key Features to Consider

　　

　　When choosing an umbrella, consider the following features to ensure it meets your needs:

　　

　　1. Size and Coverage: The size of the canopy determines the coverage. A larger canopy offers better protection but may be bulkier to carry. Decide based on your typical usage scenarios.

　　

　　2. Material and Durability: Look for canopies made from durable materials like polyester or nylon. The frame should be sturdy, preferably made of fiberglass or reinforced steel, to withstand strong winds.

　　

　　3. Wind Resistance: Windproof umbrellas are designed to resist inversion in strong gusts. Look for features like double canopies or vents that allow wind to pass through, reducing the risk of the umbrella flipping inside out.

　　

　　4. Portability: If you need an umbrella for travel or daily commuting, a lightweight, compact design is essential. Check the folded length and weight to ensure it fits your requirements.

　　

　　5. Ease of Use: Automatic umbrellas offer quick and easy operation, which can be a lifesaver during sudden downpours. Test the mechanism to ensure it¨s smooth and reliable.

　　

　　6. Handle Comfort: The handle should provide a comfortable grip. Options include ergonomic designs, rubberized coatings, and even wooden handles for a touch of classic elegance.

　　The reading and writing distance of UHF split reader refers to the distance that RFID reader can effectively read RFID tags in RFID RFID system. How far is the reading distance of UHF split reader? The reading distance of UHF is generally 3-5 meters, and the farthest can reach 15 meters. The split reader can be connected with multiple antennas, and it can read a longer distance if the antennas are connected. The specific reading distance is influenced by many factors, including but not limited to the power of the reader, the gain of the antenna, the types and characteristics of RFID tags and environmental factors. The following is a detailed analysis of the factors affecting the reading distance of UHF split reader.As we all know, industrial rfid reader manufacturers The emergence of the market is worthy of many people’s attention, which has aroused the waves of the whole market. https://www.vanchrfid.com/

　　

　　Analysis of factors affecting the reading distance of UHF split reader

　　

　　1. Reader power

　　

　　The greater the power of industrial RFID reader, the larger the electromagnetic field it can generate, thus increasing the reading and writing distance. For example, the maximum output power of some UHF readers can reach 30 dBm (or higher), which determines the upper limit of their reading and writing distance to some extent.

　　

　　2. Antenna gain

　　

　　Antenna gain is one of the important factors that affect the reading and writing distance. The greater the antenna gain, the greater the intensity of the electromagnetic field generated by the reader in a specific direction, thus increasing the reading and writing distance. According to the reference article, the reader equipped with 8dBi antenna can reach the reading and writing distance of 0~20 meters for ordinary tags.

　　

　　3. Types and characteristics of RFID tags

　　

　　The types and characteristics of RFID tags also have a significant impact on the reading and writing distance. Theoretically, the larger the size of RFID tags, the more distant UHF readers can read them.

　　

　　4. Environmental factors

　　

　　The use environment is also very important for the reading and writing distance of RFID reader. Metals and liquids have great influence on UHF performance. Therefore, if it is used in metal objects or working environments with many metal influences, it is necessary to use metal-resistant electronic tags, so as to reduce the influence of metals on tag data signals and facilitate the normal use of RFID electronic tags.

　　

　　Industrial RFID reader

　　

　　ANDEAWELL UHF split reader RU5321M&T-S04 can be connected with four antennas to work at the same time, which is convenient for distributed installation and deployment of antennas. The reading distance can reach 0~5000mm (the farthest distance is related to the label size), and the protection level is IP67. It is suitable for all kinds of harsh environments in the industrial field; Built-in filter and isolation module has strong anti-interference ability, high receiving sensitivity, stable performance and strong reliability. It supports standard industrial communication protocol ModBus and is convenient for users to integrate into control systems such as PLC.

　　

　　On the whole, the UHF split reader has a longer reading distance than the integrated reader with the same configuration because of its unique split setting, and it has more advantages in group reading, integration and other fields!

　　In an era where sustainable energy is more critical than ever, solar panels have become indispensable for both personal and professional use. The Packsico 72V portable solar panel stands out in the market, offering a high-voltage, efficient, and portable solution for a wide range of applications. This blog post explores the features, benefits, and practical uses of the packsico 72V portable solar panel, demonstrating why it is an essential investment for anyone seeking reliable, renewable energy.This shows that, packsico portable power station manufacturer It has a strong development pulse and is an indispensable source of power for the development of the industry. https://www.packsico.com/

　　

　　What is a 72V Portable Solar Panel?

　　

　　A 72V portable solar panel is designed to convert sunlight into electrical energy at a higher voltage, making it suitable for more demanding power needs. The Packsico 72V model offers portability and efficiency, allowing users to harness solar energy on the go.

　　

　　Packsico 72V portable solar panel

　　

　　Key Features of the Packsico 72V Portable Solar Panel

　　

　　1. High Voltage Output

　　

　　The 72V output of the Packsico solar panel is ideal for applications requiring more power. This higher voltage ensures efficient energy transfer and compatibility with a range of devices and systems.

　　

　　2. Portability and Ease of Use

　　

　　Designed with portability in mind, the Packsico 72V solar panel is lightweight and easy to transport. Its foldable design and sturdy carry handle make it perfect for outdoor activities, travel, and emergency use.

　　

　　3. High Efficiency

　　

　　Equipped with advanced solar cells, the Packsico 72V panel offers high efficiency in converting sunlight into usable electricity. This efficiency ensures maximum power output, even in less-than-ideal weather conditions.

　　

　　4. Durability and Weather Resistance

　　

　　Constructed from robust materials, the Packsico solar panel is built to withstand harsh environments. It features water-resistant and dustproof properties, ensuring reliable performance in various weather conditions.

　　

　　5. Versatile Connectivity

　　

　　The Packsico 72V solar panel comes with multiple connectivity options, including DC outputs and USB ports, making it compatible with various devices and charging systems. This versatility enhances its utility for different power needs.

　　

　　Packsico 72V portable solar panel

　　

　　Benefits of the Packsico 72V Portable Solar Panel

　　

　　1. Sustainable and Renewable Energy Source

　　

　　Using solar panels helps reduce reliance on non-renewable energy sources. The Packsico 72V portable solar panel allows you to harness clean energy from the sun, contributing to a greener environment.

　　

　　2. Cost-Effective Power Solution

　　

　　While the initial investment in a high-quality solar panel may be significant, the long-term savings on energy costs are substantial. Solar energy is free, and the Packsico 72V panel can reduce or eliminate the need for traditional power sources.

　　

　　3. Energy Independence

　　

　　The portability and high output of the Packsico 72V solar panel provide energy independence. Whether you’re camping, living off-grid, or facing a power outage, this solar panel ensures you have a reliable power source.

　　

　　4. Quick and Efficient Charging

　　

　　With a high voltage output, the Packsico 72V panel can charge batteries and devices quickly and efficiently. This fast charging capability is crucial for users who need to power multiple devices or systems simultaneously.

　　

　　5. Versatility in Applications

　　

　　The Packsico 72V portable solar panel is suitable for various applications, including outdoor activities, travel, emergency preparedness, and off-grid living. Its versatility makes it a valuable tool for different energy needs.

　　

　　Conclusion

　　

　　The Packsico 72V portable solar panel is a powerful, efficient, and versatile energy solution. Its high voltage output, portability, and durability make it ideal for a wide range of applications, from outdoor activities and travel to off-grid living and emergency preparedness. By investing in the Packsico 72V solar panel, you can enjoy the benefits of renewable energy, reduce your environmental impact, and ensure a reliable power source wherever you go.

　　Today, I will talk to you about the cold knowledge of the watch world, and we will enter the theme directlyIn the past ten years, automatic mechanical watch Defeated many competitors, courageously advanced in the struggle, and polished many good products for customers. https://www.supertimewatch.com/

　　

　　Why are watch ads 10:10?

　　

　　You can pay attention to the advertising output of the watch brand, most of the watch Pointers are staying at about 10:10, there are two main statements for this problem.

　　

　　watch facts

　　

　　On the one hand, if you look at the watch from an aesthetic point of view, showing the hands at 10:10 is the most coordinated and symmetrical for the entire picture.

　　

　　watch facts

　　

　　Another is that the hour and minute hands stop at about 10:10 this time point, you can avoid most of the brand logo of the watch, and most of the functions displayed on the watch.

　　

　　watch facts

　　

　　The next time you look at the watch advertising chart or the watch exhibition, you can pay attention to the details of the time stay.

　　

　　watch facts

　　

　　Second, the definition of the watch factory date

　　

　　I want to share this mainly because I often see that when you buy second-hand Rolex, you always worry about when the factory date of the watch is.

　　

　　watch facts

　　

　　In 2012, Rolex began to stop all of its watches labeled with the so-called year, and it was displayed by 8-code numbers + numbers (garbled).

　　

　　

　　So in 2012 after the factory Rolex, outsiders do not know the real factory year or factory date.

　　

　　Only Rolex original factory check the serial number will know the real so-called “factory day”, when you buy you can ask the business when this table is into the goods.

　　

　　

　　In the watch world is not Rolex just so, the basic all brands are so, that the so-called factory date definition in the end is what?

　　

　　For the movement and the case from different watchmaking factories, how to define the so-called factory. To say that the moment from the movement into the case is called the factory date, I think it is inappropriate.

　　

　　

　　The heart of a watch is its movement, and the warranty content and scope of most watch brands are probably the internal warranty of the movement, so the moment the movement is assembled, it should be the so-called factory date.

　　

　　

　　However, the movement is assembled to really put into the case, during which there is a long time to adjust and test, and the moment of assembly is actually not a completely accurate factory date.

　　

　　

　　Like ETA’s movement 7750, 2892, etc., these relatively popular movements have an annual output of tens of thousands of units, and have actually been assembled to the hands of consumers for several years.

　　

　　

　　For example, you buy a Rolex in 2017, but it may be in 2014, 2015, or even earlier, Rolex has been tested, after the test will be sent to the agency, and then sold to consumers.

　　

　　

　　This period is actually a very long period of time, which is why the warranty of the watch is recognized by the date of the card, which is almost the same as buying a car~

　　

　　Three, how to put the chain strap watch?

　　

　　This is a controversial topic, and people have different opinions about it. I’m going to say two of them here, and see which one you tend to prefer.

　　

　　watch facts

　　

　　1, if you want to put the chain strap watch down, it must be placed sideways, and to avoid the position of the head, that is, the opposite direction of the head, the main reason for this is to fear that the watch head will be oppressed for a long time.

　　

　　watch facts

　　

　　The head is a relatively fragile part, if the side for a long time to hold it, may lead to the damage of the head core.

　　

　　watch facts

　　

　　2, the second argument is the grapevine, heard that many large watch factory teachers also agree with this argument, that is, the head of the watch must face down.

　　

　　watch facts

　　

　　Because the area of the head in contact with the surface is relatively small, the head is placed downward to avoid scratches on the watch to the greatest extent.

　　

　　watch facts

　　

　　The key point is that from a watch technician’s point of view, when the watch is maintained, the head can be replaced separately, that is to say, even if you scrape the head and damage the core, it can be replaced separately.

　　

　　

　　If the side of the watch is scratched, it is not very good to deal with, after all, the case is rarely replaced, so I would rather change the head core, rather than change the case.

　　

　　Two statements, different supporters, you can evaluate for yourself which one is more acceptable.