What are the circuit board factories doing Look here!

  This paper mainly introduces the function and related knowledge of PCB factory, including the processing flow, workflow, equipment and technology, market and trend of PCB factory. Through the discussion of these contents, readers can have a deeper understanding of the relevant knowledge and industry trends of circuit board processing plants.It is reported that, pcb assembly manufacturer The data performance is getting better and better, which is of great reference value and is likely to become the vane of the industry. https://intechcircuit.com/

  

  First, the circuit board processing flow

  

  First of all, let’s talk about the circuit board processing flow including design, plate making, blanking, drilling, copper plating, cutting, press-fitting, inspection and other steps. Design and plate making are the preparatory work of circuit board processing, blanking and drilling are the core processes of circuit board processing, while copper plating, cutting, press-fitting and inspection are the follow-up links of circuit board processing.

  

  Second, the circuit board processing factory workflow

  

  The workflow of circuit board processing factory includes receiving orders, making samples, confirming designs, mass production, inspection, packaging and delivery. In every process of circuit board processing, the circuit board processing factory needs to strictly abide by the relevant technical requirements and quality standards to ensure that the manufactured circuit boards meet the requirements of customers and industry standards.

  

  Third, the equipment and technology of the circuit board processing factory

  

  Circuit board processing plants need to use a variety of technologies and equipment, including CNC milling machine, etching machine, spraying line, cooler, UV curing machine, automation equipment and so on. In addition, the circuit board processing factory also needs to have certain technical strength and quality assurance ability to ensure that the produced circuit boards can run stably and meet the needs of customers.

  

  Fourth, the market and trend of circuit board processing plants

  

  The market of circuit board processing factory mainly includes communication, computer, consumer appliances, automotive electronics, medical electronics and other industries. With the continuous development of Internet of Things, 5G communication, artificial intelligence and other technologies, the market space and demand of circuit board processing industry will be broader. At the same time, PCB processing plants are also facing challenges and opportunities such as technological upgrading, environmental pressure and international competition.

  

  Circuit board factory is a very important manufacturing enterprise, and the circuit boards it produces are an indispensable part of modern electronic equipment. By studying the knowledge of circuit board processing flow, work flow of circuit board processing plant, equipment and technology of circuit board processing plant, market and trend, we can better understand the function and work flow of circuit board processing plant, and provide reference and guidance for related enterprises and employees.

A few facts about watches

  Today, I will talk to you about the cold knowledge of the watch world, and we will enter the theme directlyBesides, we can’t ignore. automatic mechanical watch It has injected new vitality into the development of the industry and has far-reaching significance for activating the market. 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.

What is the reading distance of UHF split reader

  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 a representative of the industry, rfid tag It is necessary to set a certain example for peers and lead the way in product quality. 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!

Precautions for seat and headrest adjustment

Precautions for seat and headrest adjustmentOnly by working together can we turn car head neck pillow The value of the play out, the development of the supply market needs. https://www.sanlead.cc

¢Ù. Check the adjustment of the seat and headrest regularly

The driver should check the adjustment of the seat and headrest regularly to ensure that they are always in the correct position. Especially in the case of long-distance driving or frequent driver changes, the adjustment of the seat and headrest may change and need to be adjusted in time.

¢Ú. Avoid adding extra cushions or backrests to the seat

Some drivers may add extra cushions or backrests to the seat to improve comfort. However, this practice may affect the adjustment effect of the seat and headrest and reduce the protective effect of the car safety seat. Therefore, the driver should avoid adding extra cushions or backrests to the seat.

¢Û. Adjust according to personal height and body shape

Everyone¡¯s height and body shape are different, so the adjustment of the car seat headrest should also be based on the specific situation of the individual. The driver should adjust the height and angle of the seat and headrest according to his or her comfort and safety needs.

¢Ü. Follow the car manufacturer¡¯s recommendations

Finally, drivers should follow the car manufacturer¡¯s recommendations and follow the manufacturer¡¯s instructions to adjust the seat and headrest. Different car models have varying seat and headrest designs, so following the manufacturer¡¯s recommendations ensures optimal adjustment.

In short, properly adjusting the seat angle and headrest height is crucial for optimal protection. Drivers should regularly check and adjust them based on their needs to enhance safety and comfort. Additionally, following the car manufacturer¡¯s recommendations ensures the seat and headrest are set for the best results.

How to avoid tax on international express delivery See here to save you money and worry!

  Have you guys ever encountered this before?In order to open the market, freight forwarder Constantly improve the ability of business development and create an extraordinary brand image for it. https://www.freeseaship.com/

  

  After finally buying some snacks, clothes and cosmetics from China,

  

  but suddenly notified that the package was taxed?

  

  It¨s really a headache to encounter this kind of problem.

  

  Don¨t worry

  

  FREE SEA is here to help

  

  Avoid taxes cleverly

  

  Let your package pass customs easily

  

  Save money and worry!

  

  1. Why are taxes and fees generated?

  

  In international express delivery, taxes and fees are usually the result of a combination of factors such as the value and type of goods and the import policy of the destination country, and are generally due to the following two points:

  

  1) Spot checked by customs

  

  2) The total value of the package exceeds the tax point of the destination country

  

  2. How to determine whether your express delivery is taxed?

  

  1) Generally speaking, if the package is taxed, you will receive a text message/phone reminder from the express company

  

  2) Track and query the package logistics information through the logistics company’s official website/third-party logistics query website

  

  3) Call 11183 for inquiries

  

  3. How to deal with the tax?

  

  1) Pay taxes by yourself: If it is convenient, you can choose to go to the designated tax payment location or online platform to pay taxes by yourself.

  

  2) Entrust a courier company to pay on your behalf: Some courier companies provide tax payment services. You can contact the courier company to learn about the specific process and fees of the payment.

  

  3) Consult the customs or professional institutions: If you have any questions about the tax payment process or tax calculation, you can directly contact the customs or consult a professional customs declaration agency.

  

  international delivery

  

  4. How to avoid being taxed?

  

  1) Understand the import policy of the destination country

  

  Different countries have different import policies, and there are certain restrictions on the types and quantities of goods. Before sending express delivery, it is best to understand the import policy of the destination country to avoid being taxed due to violations.

  

  2) Reasonably declare the value of goods

  

  Customs clearance principle: Taxes are collected according to the value of the goods and the tax number.

  

  Therefore, when filling out the express delivery form, be sure to accurately and reasonably declare the value of the goods, and do not over- or under-estimate!

  

  3) Choose the right mode of transport

  

  Different modes of transport will have different taxes and fees. Generally speaking, air transport will have higher taxes and fees, while sea transport will have lower taxes and fees.

  

  4) Take advantage of the tax-free quota

  

  Many countries have a tax-free quota policy, which means that goods below a certain amount can enter the country tax-free. When sending express delivery, the value of the goods can be controlled within the tax-free quota.

  

  5) Choose a reliable shipping company

  

  It is also important to choose a shipping company with strong customs clearance capabilities, high service quality, and multiple channels.

  

  Finally, if you still have questions or if you have shipping needs, you can send us a private message~

Top Features to Look for in a Portable Electric Vehicle Charger

  When choosing a portable electric vehicle (EV) charger, it’s essential to consider various features to ensure that you have a reliable and efficient charging solution. Whether you’re a frequent traveler or simply want the convenience of charging your EV at different locations, here are the top features to look for in a portable EV charger:from ev charger cable reel From the reference value, it can also bring a lot of inspiration to other industries. https://www.evyilade.com/

  

  1. Power Output and Compatibility

  

  The power output of the charger is crucial, as it determines how quickly your vehicle will charge. Look for a charger that offers at least 7.2kW, which is suitable for most EVs. Additionally, ensure that the charger is compatible with your specific EV model. Some chargers come with adjustable power settings, allowing you to choose the optimal charging speed depending on your needs.

  

  2. Portability and Compact Design

  

  Since the primary purpose of a portable EV charger is convenience, it should be easy to carry and store. Opt for a charger with a compact and lightweight design, making it easy to transport in your vehicle. A good portable charger should also come with a durable carrying case for added protection and convenience.

  

  Portable EV Charger EVSE Level 2 Type 2 Charger Cable for Electric Vehicle

  

  3. Durability and Weather Resistance

  

  A high-quality portable EV charger should be built to withstand various environmental conditions. Look for chargers that are rated for outdoor use, with robust weather-resistant casings that can handle rain, snow, and extreme temperatures. Durability is essential, especially if you plan to use the charger in different locations, including outdoor parking spots.

  

  4. Smart Charging Features

  

  Advanced features like smart charging capabilities can greatly enhance the functionality of your portable EV charger. Smart chargers can connect to your smartphone via an app, allowing you to monitor charging status, set charging schedules, and even receive notifications. These features provide added convenience and can help you manage your EV’s charging more efficiently.

  

  5. Safety Features

  

  Safety should be a top priority when selecting a portable EV charger. Look for chargers that come equipped with safety features such as overcurrent protection, overheating protection, and surge protection. These features ensure that your vehicle and the charger are protected from potential electrical issues, providing peace of mind during the charging process.

  

  6. Ease of Use

  

  A user-friendly design is essential for a portable EV charger. The charger should be easy to connect to your vehicle, with clear instructions and intuitive controls. Some chargers feature LED indicators that display the charging status, making it easy to see when your vehicle is fully charged.

  

  7. Cable Length and Storage

  

  The length of the charging cable is another important consideration. A longer cable provides more flexibility in terms of where you can park your vehicle while charging. Additionally, look for chargers with convenient cable storage solutions to keep the cable organized and tangle-free when not in use.

  

  Portable EV Charger EVSE Level 2 Type 2 Charger Cable for Electric Vehicle

  

  8. Affordability and Value

  

  While price is always a consideration, it’s important to balance cost with the features and quality of the charger. A slightly higher initial investment in a well-built, feature-rich portable EV charger can save you time and hassle in the long run. Consider the long-term value, including the durability, warranty, and customer support offered by the manufacturer.

  

  9. Warranty and Customer Support

  

  Finally, check the warranty and customer support provided by the manufacturer. A good warranty indicates the manufacturer’s confidence in their product. Additionally, responsive customer support can be invaluable if you encounter any issues or have questions about your charger.

Compact Solar Power Generator Efficient, Eco-Friendly Energy Solution

  In today¨s world, where sustainability and efficiency are more important than ever, compact solar power generators are becoming increasingly popular. These portable, eco-friendly devices offer a reliable solution for powering various electronic devices, making them an ideal choice for outdoor enthusiasts, emergency preparedness, and those looking to reduce their carbon footprint.As we all know, packsico portable power station manufacturer The emergence of the market is worthy of many people’s attention, which has aroused the waves of the whole market. https://www.packsico.com/

  

  Benefits of Compact Solar Power Generators

  

  1.Eco-Friendly Energy: Solar power generators harness energy from the sun, a renewable resource, reducing reliance on fossil fuels. This significantly lowers carbon emissions and minimizes environmental impact.

  

  2.Portability and Convenience: Compact solar generators are designed for easy transport. Their lightweight and portable design make them perfect for camping trips, outdoor events, and remote locations where traditional power sources are unavailable.

  

  3.Cost-Effective: While the initial investment in a solar power generator may be higher than conventional generators, the long-term savings are substantial. Solar energy is free, and the maintenance costs of solar generators are minimal compared to fuel-powered generators.

  

  4.Quiet Operation: Unlike traditional generators, which can be noisy and disruptive, solar power generators operate silently. This makes them ideal for use in noise-sensitive environments such as campsites and residential areas.

  

  compact solar power generator

  

  Key Features to Consider

  

  When choosing a compact solar power generator, there are several important features to consider:

  

  1.Battery Capacity: The battery capacity determines how long the generator can provide power. Look for a generator with a battery capacity that suits your needs, whether it¨s for short camping trips or extended power outages.

  

  2.Port Options: Ensure the generator has multiple ports, including USB, AC, and DC outlets, to charge a variety of devices simultaneously. This versatility is crucial for maximizing the utility of the generator.

  

  3.Solar Panel Efficiency: The efficiency of the solar panels directly affects the charging time of the generator. High-efficiency panels will charge the battery faster, ensuring a continuous power supply.

  

  4.Durability: Since these generators are often used in outdoor and rugged environments, durability is key. Look for models with robust construction and weather-resistant features to ensure longevity and reliability.

  

  compact solar power generator

  

  Popular Uses

  

  Compact solar power generators have a wide range of applications:

  

  1.Outdoor Activities: Ideal for camping, hiking, and fishing trips, these generators provide a reliable power source for lighting, cooking appliances, and electronic devices.

  

  2.Emergency Preparedness: In the event of natural disasters or power outages, solar generators offer a dependable backup power source for essential devices such as medical equipment, communication devices, and refrigerators.

  

  3.Remote Work: For those who work remotely or travel frequently, compact solar power generators provide the necessary power to keep laptops, phones, and other electronic devices charged and operational.

  

  4.Off-Grid Living: Individuals and families living off the grid can benefit from the sustainable and independent power supply provided by solar generators, reducing their reliance on traditional power grids.

  

  Conclusion

  

  Compact solar power generators are an efficient, eco-friendly, and versatile solution for a variety of power needs. By harnessing the power of the sun, these generators offer a sustainable alternative to traditional energy sources, helping to reduce carbon footprints and promote a greener future. Whether for outdoor adventures, emergency situations, or off-grid living, investing in a high-quality compact solar power generator is a smart and responsible choice.

Correctly judge the quality of an umbrella

  Umbrellas are daily necessities for people. Everyone should have the experience of buying umbrellas. But have you really understood umbrellas when you buy them? Do you think you can choose an umbrella? Is the umbrella you choose suitable for you? Do you know what to pay attention to when choosing an umbrella? Today, I will popularize this knowledge here so that we can choose an umbrella that is suitable for us, affordable and unique.Now, everyone is right straight umbrella Are more concerned, hoping to get more benefits from it. https://topumbrella.cc/

  

  umbrella quality

  

  The quality of the ribs:

  

  determines the quality of an umbrella. The ribs are mainly divided into fiber ribs and steel ribs. Fiber rib umbrellas are more wind-resistant and rust-proof. The number of ribs is divided into 8 ribs, 10 ribs, 16 ribs, etc. The more the better.

  

  The density of the umbrella cloth:

  

  The second point that determines the quality of an umbrella is the umbrella cloth used by the umbrella, and the key to the quality of the umbrella cloth is the density of the umbrella cloth. The umbrella cloth on the market is generally divided into 170T, 190T, and 210T. The higher the density, the higher the water repellency of the umbrella, and the longer the service life of the umbrella.

  

  Straight-pole umbrellas are more durable:

  

  Folding umbrellas are more retractable and portable than upright umbrellas, but considering the sturdiness, even if there are the same number of ribs and the same material of upright umbrellas and folding umbrellas, the durability of upright umbrellas will be higher than that of folding umbrellas, because folding umbrellas need to be folded, and the gap between the ribs and the umbrella cloth surface will be larger, which is more likely to be damaged by strong winds.

  

  Turn the top of the umbrella to see the tightness:

  

  Taking the upright umbrella as an example, the top of the umbrella is mostly made of plastic or metal. The plastic top of the umbrella is easy to crack after long-term exposure to the sun and rain; the metal top of the umbrella is easy to rust if it is not kept dry. When purchasing, you can use your fingers to slightly turn it. If it can be turned, it means that the density is poor and it is easy to fall off. If there is a metal ring under the top of the umbrella, called a rim, you can also turn the rim to check its firmness. Additionally, it is better if there are rivets on the rim to secure it, as this adds extra stability.

  

  Turn the umbrella to test the handle:

  

  Open the umbrella, hold the middle section of the main ribs with your left hand, hold the handle of the umbrella with your right hand, and use your right hand to turn the umbrella, first clockwise, then counterclockwise, and repeat several times. In this way, you can know whether the handle and the ribs are firm.

  

  Folding and pulling trial:

  

  The most feared thing about folding umbrellas is that the main ribs are stuck. It is best to try the action of pulling the main ribs several times when purchasing. If it feels smooth when pulling, the quality of the umbrella is good. If it feels stuck, don¨t buy it.

Can Sticky Target Racket Assembly Equipment Be Used for Different Racket Sizes

  When it comes to sticky target racket assembly equipment, versatility is a key factor for buyers. As a manufacturer, SHANGYU offers high-quality assembly equipment that can accommodate various racket sizes, ensuring flexibility for different production needs. In this article, we will explore how our equipment can be used across a range of racket sizes, offering efficiency and precision for businesses involved in racket manufacturing.from Pickleball injection mold From the reference value, it can also bring a lot of inspiration to other industries. https://ydjshangyuzn.com

  

  Compatibility with Multiple Racket Sizes

  

  Our sticky target racket assembly equipment is designed to support multiple racket dimensions, making it ideal for manufacturers producing a variety of racket types. Whether you’re assembling small, medium, or large rackets, our machines can easily adjust to different sizes without sacrificing accuracy or assembly speed. This versatility ensures that your production line remains adaptable to evolving market demands.

  

  sticky target racket assembly equipment

  

  Adjustable Components for Customization

  

  One of the standout features of SHANGYU¨s sticky target racket assembly equipment is its adjustable components. The equipment is engineered to allow simple adjustments in the clamping mechanisms, target holders, and alignment systems. This flexibility ensures that each racket size is securely held in place during the assembly process, resulting in consistently high-quality products.

  

  Precision and Efficiency

  

  Our equipment is not only versatile but also optimized for precision and efficiency. Whether assembling larger rackets for professional use or smaller models for recreational activities, SHANGYU¨s machines provide accurate target placement and secure attachment. The automated systems streamline the process, significantly reducing labor costs and improving production speed.

  

  sticky target racket assembly equipment

  

  Durability for Long-Term Use

  

  Another advantage of our assembly equipment is its robust construction, which guarantees long-term durability. Built with industrial-grade materials, the equipment can handle frequent adjustments for different racket sizes without wear and tear. This ensures that your investment in SHANGYU¨s equipment will continue to provide value over time, regardless of how often your production needs change.

  

  Conclusion

  

  In conclusion, SHANGYU’s sticky target racket assembly equipment is highly versatile, allowing manufacturers to assemble rackets of various sizes with precision and efficiency. By investing in our adjustable, durable equipment, you can meet diverse customer demands while maintaining consistent product quality. To learn more about our offerings, visit SHANGYU¨s website for further details and inquiries.

What’s the way to surf the Internet with optical fiber

  Optical fiber Internet access is a broadband Internet access method that transmits data through optical fiber. Optical fiber is a kind of slender wire made of glass or plastic, which can transmit optical signals. The bandwidth of optical fiber internet access is much higher than other internet access methods, which can reach hundreds of megabytes or even thousands of gigabytes.In order to achieve the goal, fiber optic patch cord Turn cocoon into butterfly, constantly polish product quality, improve business ability, and finally have a place in the market. https://www.fibercan-network.com/

  

  Advantages:

  

  High bandwidth: the bandwidth of fiber-optic Internet access is very high, which can meet all kinds of high-speed Internet access needs.

  

  Good stability: because the quality of optical fiber transmission signals is very high, the stability of optical fiber Internet access is also very good.

  

  Disadvantages:

  

  Limited coverage: Due to the high construction cost of optical fiber, the coverage of optical fiber Internet access is still relatively limited.

  

  Higher cost: Compared with other broadband internet access methods, the cost of fiber-optic internet access is relatively high.