The classification of armored masks is ranked according to the degree of risk points, a class of armored masks by the municipal Drug Administration is responsible for the approval of the second class of armored masks by the provincial Drug Administration is responsible for the approval of the third class of armored masks by the State Drug Administration is responsible for the approval of the number of the larger, the greater the safety and reliability of the use of the state and use of the form of a certain difference.
The sign of the armored mask is usually on the back of the mask packaging, the main look at the product record certificate number and product technical requirements number of these two places, these two names will be followed by a certain area armored and mechanical production ready number, there are also armored masks in the top of the box will be printed on the armored name.