It's very complicated. You can directly invite professional people to do it.

It's definitely impossible to be 100% sterile. That's the talent of the laboratory. It can only be close to sterility in the market, otherwise the cost will be much higher.

What question did you ask? Can I just click free operation and maintenance on the home page?

It must be that the material composition is different. There are differences in comfort and functionality.

I think it's OK. After all, it's hard to find industry information elsewhere. I can barely read it.

It must be practical, then the price and appearance.

Very many, as long as they are disposable and clean, they are basically sanitary products.