main fighting area / zone

main defense area (line) / main defensive position

main (fighting) force(s)

main fighting line

main fighting force(s)

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 zone (of resistance)

main defense zone (defence)

main zone of defense

main fшпрештп zone

grid zone / grid-zone

zone standard time (zone time) (ZST)

killing zone / kill zone

grid zone designation / Grid Zone Designator

grey-zone / grey zone (international relations)

hundred-per-cent zone (one-hundred-per-cent zone)

no-fire zone / no fire zone

flight restriction zone / flight restricted zone (FRZ)

main battle area (MBA)

main support area

main defense (line) area

area of separation (=buffer zone)

buffer zone / area of separation

staging area / staging zone

area of war/war area

potential danger area (trouble area)

hazard area / hazardous area

killing area / kill area

open area danger area