What do you mean the lamp shell is male?

The one upstairs is right. Male model means ordinary model, which means everyone can use it. The advantage of this kind of thing is that it is cheap, but the disadvantage is that everyone uses the same mold, and there is nothing unique and novel.

There are two kinds of molds in general factories, one is a male mold and the other is a private mold. Private mold refers to the mold that the factory gives to a company alone. The advantage of this mold is that it can only be used by this company, but not by other companies, otherwise you can complain to the factory. But the disadvantage is that the company's mold opening cost is not cheap, which will lead to relatively high product prices.

Therefore, it is generally a large amount of private money and a small amount of men's money, otherwise it is not cost-effective.