Can I use filters on more than a dozen wallets and online mail?

"Can more than a dozen wallets and mail filters be used online?" Let's first analyze the materials and manufacturing technology of filters for more than a dozen wallets and emails on the Internet. Let's talk about the air filter first, because the function of the air filter is to remove particulate impurities in the air, let the engine breathe clean air and reduce wear and tear. The filter screens of more than a dozen wallets and mails on the Internet are all inferior materials, among which the inferior PU glue will have insufficient elasticity, pores and substandard hardness, which will affect the sealing performance of air filtration. Inferior filter paper is made of semi-gum starch paper, which is not water-resistant, deformed when it meets water, easily damaged and uneven pore size distribution, which will affect the filtering effect. Inferior hot melt adhesive can't meet the temperature requirements when the engine is working, and it will melt in use, so that the air filter can't achieve the filtering effect. There is also inferior air filtration, and the production process and product quality are unqualified, which greatly reduces the role of air filtration. Then let's talk about the air conditioning filter. First of all, let's talk about the function of air conditioning filter screen, which is to filter the air outside the car and improve the air cleanliness. High-quality air conditioning filter elements must be able to filter impurities, tiny particles, pollen, bacteria, industrial waste gas and dust in the air, as well as PM2.5 particles in the air, so as to protect the health of people in the car. Air-conditioning filter elements that cost more than ten yuan online are generally filtered by ordinary white fibers, so-called carbon air-conditioning filter elements. And the oil filter. First of all, let's understand that the function of the oil filter is to remove impurities such as dust, metal chips, carbon deposits, soot particles and so on in the engine during operation, thus prolonging the service life of the engine. Oil filters are divided into paper filters and centrifugal filters. Mainly talk about the spin-on filter. First of all, we need to know the composition of the spin-on filter. The inside of the rotary filter is divided into a shell, a fixed elastic sheet, a bypass valve, an inner net, filter paper, an oil outlet check valve, a threaded cover plate and a sealing baffle. There are only so many original parts needed, and the price is more than a dozen pieces. Let's start with the price. So many original components are thrown away from the profits, freight and expenses of online e-commerce. Therefore, the low price can only be achieved at the expense of the main filtering function of engine oil mechanical filter. According to my past experience, various means emerge one after another, such as increasing weight, being short in size, not installing a one-way valve, and often opening a bypass valve, thus reducing the cost, but such an oil filter cannot achieve its main function. So, to sum up, "can more than a dozen filters for wallets and emails be used online?" The answer is: no, so it is very important to pay attention to the health of the car, stay away from inferior filter elements and choose high-quality filter elements. Finally, I recommend a domestic national brand, "Boma Filter", which is not particularly famous but has excellent quality and high reputation in the industry. You can choose!