ілюмінатор, що відкривається
fixed portlight
create an opening
high altitude-high opening (HAHO)
high altitude-low opening (HALO)
high-altitude low-opening parachute technique (HALO)
firing signals (opening, shifting, ceasing fire)
air intake opening
air inlet opening
belt opening
breech-opening mechanism
breech-opening motor
clear opening
cylinder block inlet opening
feed opening
magazine feed-piece opening
front-sight opening
limit of opening fire
frame around opening
valve opening lead
muzzle opening
quick-opening cluster
opening charge
opening elevation
opening line of barrage
opening narrative
opening of hostilities
opening range
opening situation
opening stage of war
opening
angle of opening
delayed opening