1985GOST 12.4.034-1985 Occupational safety standards system.Means for individual protection of breathing organs. Classification and marking
0000 GOST 12.4.034-1978
GOST R 12.4.034-2001 Occupational safety standards system. Respiratory protective equipment. Classification and marking has been changed from GOST 12.4.034-1985 Occupational safety standards system.Means for individual protection of breathing organs. Classification and marking.