двоходовий черв'як
double enveloping worm gear
thread locker
barrel-locking thread
bolt thread
muzzle thread
interrupted thread
double-double wargame
elevating worm
elevating worm-wheel
azimuth adjusting worm knob
azimuth worm throwout lever
winch worm bearing
winch worm brake drum
winch worm brake shoe
winch worm shaft
worm and roller
worm and sector steering device
worm bearing adjustment
worm bearing thrust screw
worm brake cone
worm brake cup
worm release lever
worm reverse gear
worm shaft spacer tube
worm-wheel hub
undertype worm gear
Hindley worm
worm gear
worm one's way forward
worm's eye view
double apron fence
double bottom