GOST R EN 12942/A1/A2-2010 Occupational safety standards system. Respiratory protective devices. Power assisted filtering devices incorporating full face masks, half masks or quarter masks. General technical reguirements. Test methods. Marking
2010GOST R EN 12942/A1/A2-2010 Occupational safety standards system. Respiratory protective devices. Power assisted filtering devices incorporating full face masks, half masks or quarter masks. General technical reguirements. Test methods. Marking