defensive belt / line
рубіж / лінія / смуга оборони
waist belt, hip belt, webbing belt, combat belt, battle belt, pistol belt, war belt
wargaming methods / techniques (belt, avenue in depth, box, belt-in-time)
combat trouser belt, combat belt
belt feed pawl (belt-feed pawl)
belt-feed pawl pin / belt feed pawl pin
belt feed pawl spring / belt-feed pawl spring
assume a defensive / assume the defensive
deployment line; line of deployment (LD); line of departure