单项选择题
In cargo crane, （） for lifting the load.
A.a hoisting motor
B.a luffing motor
C.a mooring motor
D.a slewing motor
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相关考题
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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 -
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 -
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
