machining operation

механічне оброблення

electrochemical machining

electrolytic machining

spark-erosion machining

surface machining

ultrasonic machining

ion beam sputter etching or machining

clandestine operation; covert operation

humanitarian operation; humanitarian relief operation (HUMRO)

PZ operation (pick-up zone operation)

noncombatant evacuation operation (NEO); non-combat evacuation operation

aeromobile operation

African Union / United Nations Hybrid operation in Darfur (UNAMID)

air defense operation

air logistic support operation

airborne and amphibious operation

airborne assault operation

airborne/ amphibious operation

air-land operation

air-landed operation

airmobile operation

alien migration interdiction operation

Alliance operation

allied joint operation

amphibious operation

anti-air operation

anti-terrorist operation

area denial operation

area interdiction operation