MIL-L-83767B (AMENDMENT 1), MILITARY SPECIFICATION: LUBRICATING OIL, VACUUM PUMP, MECHANICAL (06-APR-1981) [S/S BY MIL-DTL-83767C]
MIL-L-83767B (AMENDMENT 1), MILITARY SPECIFICATION: LUBRICATING OIL, VACUUM PUMP, MECHANICAL (06-APR-1981) [S/S BY MIL-DTL-83767C].