Breathing apparatus

Protective breathing apparatus
nne Respirators
Respirators (Protective equipment)
Respiratory protective devices

Respirators (Medical equipment).

DTIC Thesaurus
MESH (Respiratory Protective Devices, references from Gas Masks, Respirators, Air-Purifying, Respirators, Industrial)
LC database, Nov.13, 1997 (respirators, respiratory protective devices, breathing apparatus, protective breathing apparatus, respiratory protective equipment)

Here are entered works on equipment that provides the user with a safe supply of air or oxygen in an environment where air is unavailable or unsafe to breathe. Works on equipment used to provide medical care are entered under