MIL-H-81581A (SUPPLEMENT-1), MILITARY SPECIFICATION: HOSE ASSEMBLIES, BREATHING OXYGEN AND AIR, GENERAL SPECIFICATION FOR (01-JUN-1982) [S/S BY MIL-DTL-81581B]
MIL-H-81581A (SUPPLEMENT-1), MILITARY SPECIFICATION: HOSE ASSEMBLIES, BREATHING OXYGEN AND AIR, GENERAL SPECIFICATION FOR (01-JUN-1982) [S/S BY MIL-DTL-81581B].