гвинтоподібний рівнобіжний наріз
security dilemma / spiral mode
angle of spiral
spiral vortex
spiral
spiral scanning
spiral scan
slot-type groove
barrel groove
breechblock-stop groove
cam 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
parallel barrage
parallel pursuit
creeping parallel barrage
immovable parallel barrage
parallel sweep search
dependent parallel approach
independent parallel approach
plane-parallel flow
parallel
parallel approach
parallel rule(r)
parallel track pattern