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
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相关考题
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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 -
单项选择题
（） provides the head or pressure to supply the domestic water where required.
A.The compressed air
B.The compressing air
C.The transfer pump
D.The head tank -
单项选择题
Under rotary pumps are the gear, （）, cam-and-piston and screw types.
A.reciprocating
B.diffuser
C.turbine
D.vane
