main base

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

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 fleet base

main operating base

defense industrial base / military-industrial base

naval base; naval operating base

direction of the main blow

main (fighting) force(s)

Main Air Traffic Flow Management Centre (MATFMC)

Main Armaments Directorate of the RF Armed Forces

main attack

main ballast tank

main battery

main battle area (MBA)

main battle force

main battle tank (MBT)

main blow

main body

main charge

main command post

main concentration (of troops)

main control room

main convoy

main crossing

main defense forces

main dressing station

main effort