main operating base

naval base; naval operating base

base junction; rotary collector ring (box); rotary base junction (of a tank); rotary connection; slip ring; traverse rotary base junction

deployment operating base

emergency fleet operating base

forward operating base (FOB)

naval operating base (fixed or temporary)

base operating supply system (BOSS)

main defense area (line) / main defensive position

main tank/ main fuel tank

main gear box / main rotor transmission

main rotor transmission / main gear box

main-rotor head / main-rotor hub

main-rotor hub / main-rotor head

main base

main fleet base

defense industrial base / military-industrial base

battlefield operating system (BOS)

buffer and operating-rod group

common operating environment (COE)

contemporary operational environment / contemporary operating environment (COE)

ground operating equipment

missile operating area

operating environment (OE)

operating forces

operating forces of the Navy

operating frequency

operating mechanism

operating principle

operating procedures

operating rod assembly

operating rod group

operating speed