MIL-R-9057C (NOTICE 2), MILITARY SPECIFICATION: REGULATOR, DELUTER DEMAND, OXYGEN, TYPE A-15 (05-SEP-1978) [S/S BY MIL-R-7605 & MIL-PRF-7605]

MIL-R-9057C (NOTICE 2), MILITARY SPECIFICATION: REGULATOR, DELUTER DEMAND, OXYGEN, TYPE A-15 (05-SEP-1978) [S/S BY MIL-R-7605 & MIL-PRF-7605]., Specification MIL-R-9057C (USAF), dated 5 August 1959, is hereby cancelled. Future procurement of regulators should be made by superseding Military Specification MIL-R-7605, Regulator, Oxygen, Demand, Pressure Breathing, Type A-21.