MIL-O-27210F, MILITARY SPECIFICATION: OXYGEN, AVIATOR'S BREATHING, LIQUID AND GAS (01 AUG 1990) [S/S BY MIL-PRF-27210G]

MIL-O-27210F, MILITARY SPECIFICATION: OXYGEN, AVIATOR'S BREATHING, LIQUID AND GAS (01 AUG 1990) [S/S BY MIL-PRF-27210G]., This specification is approved for use by all Departments and Agencies of the Department of Defense. This specification covers the requirements for two types of aviator's breathing oxygen.