The split reader can connect multiple reader antennas at the same time, which is flexible in deployment and wide in reading distance, and has applications in many scenes. Let’s take a look at the advantages and disadvantages of high-frequency split reader.In today’s market background, industrial rfid reader manufacturers Still maintain a strong sales data, and constantly beat the competitors in front of us. https://www.vanchrfid.com/

　　

　　Advantages of high frequency split reader

　　

　　1, high flexibility

　　

　　The read-write module and antenna of high-frequency split reader are separated from each other, and the antenna can be installed and used independently, allowing the position and angle of the antenna to be adjusted to flexibly adapt to different application environments and requirements. This design is especially suitable for high altitude, underground parking and other complex environments, ensuring that the reader can effectively read and write RFID tags.

　　

　　2. Wide reading range

　　

　　The split reader can easily expand the coverage of the reader and improve the reading and writing efficiency by increasing the number of antennas or adjusting the antenna layout to meet the ever-changing application requirements.

　　

　　3, the maintenance cost is low

　　

　　The read-write module of the high-frequency split reader is deployed and used separately from the antenna. Once the antenna fails, the equipment can be easily replaced, and the maintenance cost is relatively low.

　　

　　Disadvantages of high frequency split reader

　　

　　1, the installation is more complicated.

　　

　　Split reader needs to design the installation position of antenna and reader according to the application scenario. If a reader is connected with multiple antennas at the same time, it needs to adjust the deployment and installation, and the installation steps are relatively complicated.

　　

　　2, vulnerable to environmental interference

　　

　　There is a certain distance between the reader and the antenna, and it will be more easily disturbed by external factors under harsh environmental conditions such as metal and moisture, which will affect the recognition effect.

　　

　　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.

　　

　　At present, high-frequency RFID split readers are widely used in warehousing logistics, book management, production line automation and other fields. Antennas and readers are installed at multiple entrances and exits or shelves of warehouses to realize the rapid entry and exit of goods and inventory checking, and improve the efficiency of warehousing management. The reader and antenna are installed on the intelligent bookshelf to realize the rapid positioning and inventory of books and improve the efficiency of book management; The reader and antenna are installed at the key nodes of the production line to realize the automatic monitoring and traceability of the production process.

　　I don’t know when it started, but when I searched for international express delivery on a certain book, I saw all the ads holding signs saying “XX from China, 10KG = 38 yuan, regardless of whether it is ordinary or not.”For the immediate pressure, shipping agent With its own coping style, it can break the predicament and usher in a new life through the quality of the product itself. https://www.freeseaship.com/

　　

　　On average, this means less than two yuan per pound. Do you have any idea whether you can get this price?

　　

　　0.jpg

　　

　　Let’s think about it first. This price is impossible even in China, let alone international express delivery. Is it possible?

　　

　　Secondly, families should know that international express delivery does not distinguish between sensitive goods and general goods.

　　

　　In terms of cost alone, sensitive goods are higher than general goods. The fear is that you will be warmly received at the beginning, but then turn your back on them.

　　

　　00.jpg

　　

　　Then there may be such a situation: you don’t find such a shipping company, but you still fall into the trap. How should you avoid these pitfalls?

　　

　　Family members have done their homework, and the key points are as follows! !

　　

　　international shipping

　　

　　1. Check the business license

　　

　　Whether a company is operating in compliance can be determined by checking the company’s qualification certificates, such as whether it has international freight forwarding qualifications and other permissions.

　　

　　2. Be wary of ultra-low prices

　　

　　International express delivery costs cannot be much lower than the market price. Too low quotes often hide traps

　　

　　There may be other charges, such as packaging fees, photo fees, etc., and there may even be extremely expensive additional weight prices, which are more expensive than the generally advertised 60 yuan per kg. Don’t try it at the cost of losing more for a small price. It’s not worth it.

　　

　　3. Whether the price is clearly marked

　　

　　See whether the fee is charged according to the quotation form. Many companies often start charging various fees after the user places an order to the warehouse: handling fees, material fees, labor fees, etc.

　　

　　4. Is there an official website system?

　　

　　Generally, regular shipping companies have their own official website systems. Global Express not only has its own official website but also has a mini program. All package information can be checked, and there will also be exclusive customer service to follow up.

　　

　　5. Pay attention to surcharges

　　

　　Pay special attention to surcharges, which may be more expensive than the freight in a few minutes! You must ask clearly what surcharges there are before placing an order.

　　

　　6. Keep evidence

　　

　　When communicating with the shipping company, keep chat records, quotations, contracts and other evidence in case of emergency.

　　

　　Dear family members, don’t be greedy for small profits. Be sure to keep your eyes open before sending express delivery! After all, it’s all money!

　　

　　Finally, if you still have questions that you don’t understand, or if you have any shipping needs, you can consult us~

　　Working principle of automatic hemming equipment for injection molding:In the eyes of industry experts, Pickleball welding equipment Indeed, it has great development potential, which makes many investors more interested. https://ydjshangyuzn.com

　　

　　Preparation of racket embryo: Prepare the racket embryo with the racket body and handle in advance through a specific process (such as molding, etc.).

　　

　　Mould installation and positioning: Accurately install the racket mold at the corresponding position of the injection molding machine to ensure that the key parts such as the mold cavity and the injection molding system are accurately matched.

　　

　　Feeding and melting: Add plastic particles to the hopper of the injection molding machine, and gradually melt the plastic particles into a liquid state through the heating system of the injection molding machine (such as resistance heating, etc.), and convey them forward under the push of the screw, etc.

　　

　　Injection stage: After reaching the appropriate fluidity and other states, the liquid plastic is injected into the mold cavity where the racket embryo has been placed under a certain pressure, and the liquid plastic will flow and fill along the outer peripheral side of the racket embryo.

　　

　　Cooling and shaping: The plastic entering the mold cavity is cooled quickly through the mold’s own cooling channel (such as cooling water), and the plastic gradually solidifies and tightly wraps around the outer peripheral side of the racket embryo to form a rim.

　　

　　Demolding: The mold is opened by the mold opening mechanism (such as hydraulic or mechanical drive, etc.), and the finished racket with rim is removed from the mold by the ejection mechanism (such as ejector rod, etc.).

　　

　　Working principle of hot pressing rimming automatic equipment (hypothetical situation):

　　

　　Edge material delivery: The pre-prepared rimming material (such as rubber strips, TPU strips, etc.) is released from the unwinding device at a certain speed and tension, and transported to the working area through conveyor tracks or rollers.

　　

　　Racket positioning: The pickleball racket is placed on a specific working platform through a mechanical arm or conveyor belt, and the racket position is ensured to be accurate through positioning mechanisms (such as clamps, sensor induction, etc.).

　　

　　Preheating: Before the hemming contacts the racket, the hemming material and/or the hemming area of the racket are preheated. The material can be softened by infrared heating, hot air heating, etc. to facilitate subsequent bonding.

　　

　　Hot pressing bonding: The hemming material is pressed tightly against the edge of the racket by using a hot pressing head (with a certain shape and temperature control) to make the hemming material tightly bonded to the edge of the racket under the action of pressure and temperature.

　　

　　Cooling and curing (if necessary): After hot pressing, the hemming material is quickly cured and shaped on the racket by air cooling or other cooling methods.

　　

　　Trimming (if necessary): Use a knife or laser to cut off excess hemming material.

　　The sishun umbrellas is an indispensable companion in your life.More importantly, put straight umbrella It is imperative for us to make thorough analysis and maximize its social function. https://topumbrella.cc/

　　

　　Over time, Blue Bottle Coffee has become synonymous with taste and quality coffee. They select the

　　

　　finest coffee beans, undergo strict roasting and refinement, and bring a taste feast to coffee lovers.

　　

　　This time, Blue Bottle Coffee has infused their unique elements into the umbrella, themed around

　　

　　this concept. This umbrellas is not just a simple sunshade tool but also a symbol of lifestyle.

　　

　　umbrellas

　　

　　With an umbrellas, comes a sense of graceful tranquility.

　　

　　umbrellas

　　

　　Every detail is infused with our passion and professionalism, from the handle to the top

　　

　　of the umbrellas, showcasing our relentless pursuit of perfection.

　　

　　Not only beautiful but also highly practical. With this umbrellas, you can maintain your

　　

　　composure and enjoy life in any weather conditions.

　　

　　Elegant appearance and outstanding performance allow you to maintain style in any

　　In the process of driving and using a vehicle, many details can affect our driving safety, one of which is the car headrest. Many people mistakenly believe that the headrest is only for comfort, but in reality, it plays a crucial role in driving safety. In rear-end collisions, sudden impacts may subject the body to force, but a suitable headrest can effectively alleviate this risk.Without exception, car head neck pillow Our customers are willing to purchase their products, because high quality is the concept of their products. https://www.sanlead.cc

　　

　　car head neck pillow

　　

　　The Safety Function of Car Headrests

　　

　　In rear-end or back collisions, an impact hits the vehicle, and great force pushes the passenger¨s body forward, driving the torso ahead while inertia causes the head to lag behind, resulting in severe neck movement. This phenomenon is known as ＾whiplash.￣ The reason it occurs is that the head fails to keep up with the body¨s speed, resulting in excessive pressure and injury to the cervical spine. If the height and position of the headrest are inappropriate, the risk of cervical spine injury will significantly increase, potentially leading to fatal injuries.

　　What does optical fiber mean? Optical fiber is a kind of slender flexible glass or plastic fiber used to transmit optical signals, which is usually used to transmit high-speed data and communication signals over a long distance. The core of optical fiber is surrounded by materials with high refractive index and covered by materials with low refractive index. This design allows light to propagate inside the core with almost no optical loss, so that optical signals can be transmitted over a long distance without obvious signal attenuation. Optical fiber has become one of the most important technologies in modern communication field, which is widely used in telephone, Internet, television and computer network.According to professional reports, fiber optic pigtail There will be a great period of growth, and the market business is constantly expanding, and it will definitely become bigger and bigger in the future. https://www.fibercan-network.com/

　　

　　In optical fiber, optical signal is converted into optical pulse and propagates along the core, which enables the signal to be transmitted over a long distance without obvious signal attenuation. Here are some basics of getting started with optical fiber:

　　

　　Optical fiber structure: Optical fiber is mainly composed of core, cladding and sheath. The core is the core of optical signal transmission, usually made of glass or plastic with high refractive index. The cladding is surrounded by low refractive index material to protect and guide light, and the sheath is used to protect the optical fiber and enhance its strength.

　　

　　Working principle of optical fiber: When light enters from a medium with high refractive index into a medium with low refractive index, the light will be totally reflected. The refractive index of the core material of optical fiber is higher than that of the cladding material, which makes the light can be totally reflected in the core for many times, thus realizing signal transmission.

　　

　　Optical fiber type: Common optical fiber types include single-mode optical fiber and multimode optical fiber. Single-mode fiber has small core diameter and high refractive index, which is suitable for long-distance and high-speed transmission. The core diameter of multimode fiber is large, which is suitable for short-distance transmission.

　　

　　Optical fiber application: Optical fiber has become one of the most important technologies in modern communication field, which is widely used in telephone, Internet, television and computer network. It is also widely used in medical, military, aerospace and scientific research fields.

　　

　　Advantages of optical fiber: Compared with traditional copper cable, optical fiber has higher bandwidth, lower signal attenuation and smaller signal delay. In addition, the signal of optical fiber is not easy to be eavesdropped or interfered, so it has higher security.

　　In today’s fast-paced world, staying connected is more important than ever. Whether you’re camping in the wilderness, traveling, or simply dealing with a power outage at home, having a reliable power source is crucial. A portable power station with usb ports is the perfect solution to keep your devices charged and ready whenever you need them. This blog post will explore the many benefits and features of these versatile power stations, ensuring you never run out of juice when you need it most.For this reason, it can be speculated that packsico portable solar panel The market feedback will get better and better, which is one of the important reasons why it can develop. https://www.packsico.com/

　　

　　portable power station with usb ports

　　

　　Why Choose a Portable Power Station with USB Ports?

　　

　　A portable power station with USB ports offers numerous advantages, making it an essential gadget for a variety of scenarios:

　　

　　1.Versatility: These power stations can charge a wide range of devices, from smartphones and tablets to laptops, cameras, and even small appliances. The inclusion of multiple USB ports allows you to charge several devices simultaneously, making it ideal for family trips or group outings.

　　

　　2.Portability: Designed to be compact and lightweight, portable power stations are easy to carry wherever you go. Whether you’re hiking, camping, or traveling, you can conveniently pack them in your bag or vehicle.

　　

　　3.Reliability: With advanced battery technology, these power stations provide a dependable source of energy. They are designed to hold a charge for extended periods, ensuring that you have power when you need it most.

　　

　　4.Eco-Friendly: Many portable power stations are equipped with rechargeable batteries, reducing the need for disposable batteries and minimizing environmental impact. Some models even offer solar charging options for a greener alternative.

　　

　　portable power station with usb ports

　　

　　Key Features of a Portable Power Station with USB Ports

　　

　　When selecting a portable power station, consider the following features to ensure you choose the best one for your needs:

　　

　　1.Multiple USB Ports: Look for a power station that offers multiple USB ports, allowing you to charge several devices simultaneously. This is especially useful for families or groups with multiple electronic devices.

　　

　　2.High Capacity Battery: The capacity of the battery, measured in watt-hours (Wh), determines how long the power station can keep your devices charged. Choose a model with a higher capacity for longer trips or extended power outages.

　　

　　3.Fast Charging Technology: Some power stations come with fast charging technology, which can significantly reduce the time it takes to charge your devices. Look for models that support Quick Charge (QC) or Power Delivery (PD) for the fastest charging speeds.

　　

　　4.Multiple Output Options: In addition to USB ports, some power stations offer additional output options such as AC outlets, DC ports, and carports. This versatility allows you to power a wider range of devices and appliances.

　　

　　5.Safety Features: Ensure the power station has built-in safety features such as overcharge protection, short-circuit protection, and temperature control to safeguard your devices and the power station itself.

　　

　　Top Uses for a Portable Power Station with USB Ports

　　

　　1.Outdoor Adventures: Whether you’re camping, hiking, or fishing, a portable power station ensures your devices stay charged, providing you with essential connectivity and entertainment.

　　

　　2.Travel: Long road trips or flights can drain your devices’ batteries. A portable power station allows you to charge your electronics on the go, keeping you connected and entertained.

　　

　　3.Emergency Preparedness: Power outages can occur unexpectedly. Having a portable power station on hand ensures you can keep your essential devices charged, including phones, flashlights, and medical equipment.

　　

　　4.Work and Productivity: For remote work or outdoor events, a portable power station provides the necessary power to keep your laptop, phone, and other devices operational, ensuring productivity no matter where you are.

　　

　　Conclusion

　　

　　A portable power station with USB ports is a versatile and reliable solution for keeping your devices charged and ready in any situation. Whether you’re exploring the great outdoors, traveling, or preparing for emergencies, this essential gadget provides the power you need when you need it most. Invest in a high-quality portable power station today and enjoy the peace of mind that comes with having a dependable power source at your fingertips.

　　

　　Ensure you’re never left without power again with a portable power station with USB ports, the ultimate power solution for all your charging needs.

　　Is a watch a “necessity” for men? I think there are two kinds of answers, yes or no, and whether they are positive or not, both answers have their own truth, today we will analyze it with you.Therefore, we should understand diving watch Many benefits, absorb and summarize, and use them. https://www.supertimewatch.com/

　　

　　watch necessity

　　

　　First of all, the view that the watch is not essential, the most essential function of the watch is to help people get time, but now there are too many electronic products that can achieve this function, and more accurate, so the basic function of the watch has long been replaced, for many people, the watch has no practicality at all.

　　

　　watch necessity

　　

　　Then why is it a “necessity”? This is about to talk about what role the watch plays in today’s era, women like diamonds, the watch is not a man’s diamond! There is a saying that men have never grown up, but toys are getting more and more expensive, and the love of watches, no matter what age men are the same.

　　

　　watch necessity

　　

　　For men, there are not many items that can be used to decorate themselves, and the watch in my opinion can be counted as the best decorative items for men, and now the biggest role of the watch is people’s social needs, a small watch can highlight a man’s wealth and status, and the added value it brings to men is far better than the gold chain or jade bracelet.

　　

　　watch necessity

　　

　　Of course, I suggest that men are best to wear mechanical watches, expensive and exquisite mechanical watches, not only can bring the ultimate visual feast, but also the world watch auction provides value endorsement for the mechanical watch culture. However, although the famous watch is good, it is recommended that you do according to your ability~

　　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.Since then, more and more people have found that china aluminum pcb assembly factory The value of, thus affecting the choice of many people. 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.

　　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.Only by working together can we turn pcb assembly manufacturer The value of the play out, the development of the supply market needs. 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.