... against C6H6,CL2 SO2 1.Purpose and CharacteristicMF25 half face piece gas mask is apply to the workers, ... . The product’s components are the body of half face mask, the cartridge, exhale valve, rubber headbands. The ... it should be kept straight, stayed close to the face , warped the mouth and nose, and the both ... again if necessary.3.4 After using, the half face piece should be cleaned by alcohol or 1% ...