GGG-M-125-1B, FEDERAL SPECIFICATION, RESPIRATOR ASSEMBLIES: AIR LINE, WITH FACEPIECE (SUPPLIED AIR) (20 SEP 1982)

GGG-M-125-1B, FEDERAL SPECIFICATION, RESPIRATOR ASSEMBLIES: AIR LINE, WITH FACEPIECE (SUPPLIED AIR) (20 SEP 1982)., This specification covers the specific requirements for halfmask and full-mask facepieces designed for use with supplied air.