куліса
slot-type groove
spiral parallel groove
barrel groove
breechblock-stop groove
circular groove (of ammunition)
crimping groove
dismounting groove
vertical oil groove
extraction groove
extractor groove
finger groove
four-groove barrel
groove for coupling
groove
cam
cam roller
camouflage (cam)
cam cream
camo (cam)
cam pin
cam plate pin
cam roller pin
track pin driving cam
track-pin retaining cam
adjustable cam
adjusting cam
block rotating cam
brake shoe cam adjusting bolt
cam and brake member
cam and double roller
cam and twin lever
cam effect of hammer