单项选择题
The duty of a deck winch is to lift and lower a load by means of a fixed rope on （）.
A.a warp end
B.a mooring winch
C.a worm gear
D.a barrel
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相关考题
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单项选择题
Most anchor handling equipment incorporates （） for mooring purposes.
A.cable lifters
B.spur wheels
C.bollard
D.warpends -
单项选择题
A variable displacement system of hydraulic drives consists of （）.
A.a variable displacement axial piston pump
B.a constant displacement axial piston pump
C.a reciprocating piston pump
D.a centrifugal pump -
单项选择题
Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）
A.Constant pressure system
B.Variable pressure system
C.Variable displacement system
D.Constant volume system
