自己囤的口罩，20个装，这个p2口罩就是N95口罩。有需要的短信联系
Why use a P2 face mask? (also called N95)
Disposable P2/N95 face masks (also known as P2/N95 respirators) are able to filter out very fine particles from the air when worn correctly, and so reduce the risk of airborne transmission of Q fever and other infectious diseases when working in potentially contaminated areas
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