The difference between protective glasses and protective masksProtective glasses and face shields are a kind of personal protective equipment, mainly to protect the eyes and face from dust, smoke, metal and gravel debris and chemical solution splash damage, some special protective glasses or face sh

Protective maskThe protective mask is an industrial protective mask used to protect the eyes and face from dust, chemicals, heat, poisonous gas, debris and other harmful substances. It is equipped with toothed knobs on the left and right sides of the elastic head clamp. A large arc-shaped thin curve

Scientific common sense about masks（2）4. Is it necessary to use medical protective masks to protect against viruses? What is the difference between medical N95 and N95 protective masks?Medical protective masks are protective masks designed to protect medical workers in a specific medical environment

MaskMasks are a kind of sanitary products, which are generally worn on the mouth and nose to filter the air entering the mouth and nose to block harmful gases, odors, droplets, viruses and other substances. They are made of gauze or paper. Masks have a certain filtering effect on the air entering th