Second, there are 500 to 1500 high-pressure water guns, more than 200 foaming machines, 400 to 800 dehydrators and more than 400 vacuum cleaners. There are also polishers, glaze sealers, hot air guns and so on. These are the most common devices. You actually do too much.
Third, we must have certain skills. Take tire repair as an example. If you are not skilled, you may break the tire, and there is tire pressure testing.
Fourth, every tire seller may not have some goods, but every brand has some. Don't you want someone to change a pair?
Fifth, the purchase channel depends on where you are. If you don't give money, why should people trust you and give you goods? If so, prepare 20W.