GOST EN 12942-2012 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
2012GOST EN 12942-2012 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