дисковий магазин
ammunition drum
drum-beat cadence
drum major (field commander / marching band)
back-sight drum
brake drum
brake drum shaft
clinometer drum
winch drum shaft bracket
winch worm brake drum
deflection drum (of a sight)
drum brake
drum heater
drum yard scale
elevation drum
drum
feed drum
cartridge drum
circular
circular error probable (CEP)
circular trajectory
circular call sign
circular groove (of ammunition)
circular leaf spring
circular traffic
circular velocity
circular augmenting charge
circular cross-section fuselage
circular section fuselage
circular-section frame
crescent-shaped circular arc aerofoil section
circular arc aerofoil section
flat-convex circular arc aerofoil section