本标准的目的是为民用飞机机组人员使用的机组需求和压力呼吸氧气面罩组件制定最佳标准。本标准涵盖以下类别的普通型和快速佩戴型口罩组件:a.a类、口鼻型、需求b.b.类、口鼻型、压力需求c.c.类、全脸型、需求d.类、全脸型、压力需求

The purpose of this standard is to establish optimum standards for crew demand and pressure-breathing oxygen mask assemblies for use by crew members in civil aircraft. 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