单项选择题
A.a hoisting motor B.a luffing motor C.a mooring motor D.a slewing motor
Manually operated band brakes may be fitted and （） will...
单项选择题Manually operated band brakes may be fitted and （） will have a brake arranged to fail-safe.
A.the drive pump B.the drive motor C.the warp end D.the purchase
The （） is used for hauling in or letting out the wires ...
单项选择题The （） is used for hauling in or letting out the wires or ropes.
A.windlass B.anchor capstan C.turning gear D.winch barrel
（） may be fitted for operating the derrick topping lift...
单项选择题（） may be fitted for operating the derrick topping lift (the wire which adjusts the derrick height).
A.A capstan B.A hold C.A warp end D.A mooring drum
