只要您戴上它，许多人可能会认为它们都是一样的。不是这种情况。面罩的正面和背面功能不同。
Viruses are the smallest particles among the particles we can come into contact with daily.
Common masks include the following types: ordinary cotton masks, disposable masks (such as medical surgical masks, ordinary medical masks), and medical protective masks (N95/KN95 masks).
The disposable three-layer mask is made of two layers of fiber non-woven fabrics that are professionally used in medical and health, and a layer of filter and spray cloth with a filtering and antibacterial effect of more than 99% is added by ultrasonic welding.
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