It is not only embarrassing to bring it up and down in the wrong way, but also does not play its due protective role. You can know the front and back of masks like N95 and N90 at a glance. Medical disposable masks are generally blue on one side and white on the other. Blue is the outside of the mask and white is the inside. Disposable masks with white faces on both sides are difficult to distinguish, so it is necessary to carefully distinguish the front and back.
Look at this metal strip. The metal strip is the top of the mask. Look at the discount (discount) Folding down is the outside of the mask. After wearing a mask, remember to press the metal strip on your nose. Pull down the mask and let it protect your mouth and nose tightly.
Brief comments on masks
Mask is a sanitary product, which is usually worn on the nose and mouth to filter the air entering the nose and mouth. It is made of gauze or paper to prevent harmful gases, smells and droplets from entering and leaving the mouth and nose of the wearer.
Masks have a certain filtering effect on the air entering the lungs. Wearing a mask has a very good effect when respiratory infectious diseases are prevalent and when working in polluted environments such as dust.
20021165438+4 the State Council Press Office held a press conference to introduce that China exported 224.2 billion masks in 2020. In February165438+1October, the General Administration of Market Supervision and other four departments jointly deployed to strengthen the supervision of mask quality.
/kloc-at the end of 0/9, masks began to be used in the medical field, and German pathologist Ledec began to advise medical staff to use gauze masks to prevent bacterial infection.
Baidu Encyclopedia-Mask