SANS 50138-1994 呼吸保护装置．带全罩式面罩的自主式开路压缩空气呼吸装置．要求，试验，标记
Respiratory protective devices - Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly - Requirements, testing, marking
Specifies minimum requirements for fresh-air hose-breathing apparatus for use with a full-face mask, a half mask or a mouthpiece assembly as a respiratory protective device.