циркулярний позивний (для загального виклику всіх радіостанцій мережі)
tactical sign (tac-sign)
call sign (callsign)
collective call sign
net call sign
tactical call sign
address call sign
call sign
visual call sign
voice call sign
call sign (signal)
call up (call-up)
circular
circular error probable (CEP)
circular trajectory
circular groove (of ammunition)
circular leaf spring
circular magazine drum
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
circular vortex
semi-circular deviation
circular scan
circular scanning mode
circular sweep
circular time base