Fit of the respirator to the face is very important. If it does not fit properly, airborne contaminates will penetrate (enter underneath) the facepiece seal.
Fit of the respirator to the face is very important. If it does not fit properly, airborne contaminates will penetrate (enter underneath) the facepiece seal.
佩戴合适脸型的防毒口罩非常重要。否则空气中的有害细菌仍能够从口罩和脸部的缝隙中渗透进来。