кільцева проточка
slot-type groove
spiral parallel groove
barrel groove
breechblock-stop groove
cam groove
crimping groove
dismounting groove
vertical oil groove
extraction groove
extractor groove
finger groove
four-groove barrel
groove for coupling
groove
circular
circular error probable (CEP)
circular trajectory
circular call sign
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