барабанчик оптичного прицілу
deflection drum (of a sight)
back-to-back circuit
back-to-back connection
back-to-back radio stations
back-to-back relay
back-sight leaf
backsight slide; back-sight slide
back sight
ammunition drum
drum-beat cadence
drum major (field commander / marching band)
brake drum
brake drum shaft
circular magazine drum
clinometer drum
winch drum shaft bracket
winch worm brake drum
drum brake
drum heater
drum yard scale
elevation drum
drum
feed drum
cartridge drum
front sight (fore / muzzle sight)
sight, to take a (careful) sight
day-sight (day sight)
modular integrated display and sight helmet (Modular Integrated Display-And-Sight Helmet)
back-up fire control
back-up system
cut back co-operation
I read back