GGG-M-125-2A, FEDERAL SPECIFICATION, RESPIRATOR ASSEMBLIES: AIR LINE, WITH HELMET (SUPPLIED AIR) (20 SEP 1982)

GGG-M-125-2A, FEDERAL SPECIFICATION, RESPIRATOR ASSEMBLIES: AIR LINE, WITH HELMET (SUPPLIED AIR) (20 SEP 1982)., This specification covers the specific requirements for respirators equipped with helmet type respiratory-inlet coverings for use with a continuous flow of supplied air.