单项选择题
A.dog clutch B.Pair of gears C.worm gear D.turning gear
The rotating unit of a spilt windlass consists of a（） w...
单项选择题The rotating unit of a spilt windlass consists of a（） with shaped snugs to grip the anchor cablea mooring drum for paying out or letting go of mooring wires and warp end for warping duties.
A.cranes B.mooring barrel C.capstans D.cable lifter
Worm geared automatic mooring winches are （） as the mul...
单项选择题Worm geared automatic mooring winches are （） as the multi-start feature reduces the advantage of worm gear iethe high gear radio.
A.popular B.common C.in lead position D.uncommon
The majority of automatic mooring winches are spur gear...
单项选择题The majority of automatic mooring winches are spur geared to improve the backward efficiency of the gear train for rendering（）
A.spur geared B.screw geared C.worm geared D.belt driven
