We often worry about buying counterfeit and inferior accessories and unpopular accessories. First, the packaging of the original packaging of the packaging is generally standardized, the standard specifications are uniform, and the marks are clear and formal. It should be marked with the product name, specification model, quantity, registered trademark, factory name, factory address and telephone number, etc. Some manufacturers are still in the accessories. Play your own mark. Second, look at the surface of the components that qualify, the printing or casting and the marking are clear and formal. It has a certain accuracy and brightness. The more important the parts, the higher the accuracy. If you find that the parts are rusty spots or rubber cracked, losing elasticity, or obvious car knife patterns on the surface of the nephew, they should be replaced. Third, see the illegal merchants of the paint simply processing the waste accessories, such as disassembly, installation, fighting, combined, painting, etc., and then pretend to be "qualified products" for sale. Fourth, the appearance of inferior products is sometimes good, but due to poor production process, cracks, sand holes, residue, burrs or injuries. If the cylinder cushion is squeezed and deformed, it is easy to cause the sealing and ablation when used, leading to oil leakage, air leakage and water leakage. Fifth, look at the "loosening" accessories composed of two or more parts, and the parts are not allowed to loosen through pressure, glue connection or welding, and are not allowed. 6. See the assembly mark to ensure the assembly relationship of the accessories meet the technical requirements. Some regular parts have assembly marks on the surface, such as the assembly mark of regular gear marks, piston top marks, etc. to ensure the correct installation of the machine. Blogging cannot be identified, it will bring great difficulties to assembly, or even wrong. 7. Look at the lack of formal assembly components must be complete to ensure smooth loading and normal operation. The leakage of small parts on some assembly may be "parallel imports", which is easy to cause difficulty in loading. It may even be scrapped due to the shortage of individual small accessories. 8. See the protective layer to facilitate storage and prevent parts from bumping. There are protective layers before the factory leaves the factory. Such as piston sales, bearing tiles are protected by paraffin; piston rings, cylinder suits on the surface of rust -proof oil and wrapped in packaging paper; valve, piston and other rust -proof oil are packaged with plastic bags. If you find that the sealing sleeve is damaged, the packaging paper is lost, and the rust oil or paraffin is lost, it should be returned. Nine, look at some important components of the documents, especially the total category, such as carburetor, split appliances, generators, etc., usually with instructions and qualification certificates when leaving the factory to guide users to install, use and maintain. 10. Look at the specifications of most automotive accessories. There are prescribed models and technical parameters. If you buy electrical equipment, you should pay attention to whether the voltage and power of the replaced parts should be consistent.
