Annotation of standard text SAE AS452B :
This standard covers both general type and quick-donning type mask assemblies in the following classes:a
Class A, oronasal, demand
b
Class B, oronasal, pressure-demand
c
Class C, full face, demand
d
Class D, full face, pressure-demand
SUBJECT TAXONOMY: Human factors, Oxygen equipment, Oxygen, Safety, Occupant protection
SUBFILE: Aerospace
TYPE OF DOCUMENT: Aerospace Standard
Stabilized: Oct 2014 