单项选择题
A.less B.more C.many D.much
The duty of a deck winch is to lift and lower a load by...
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
Most anchor handling equipment incorporates （） for moor...
单项选择题Most anchor handling equipment incorporates （） for mooring purposes.
A.cable lifters B.spur wheels C.bollard D.warpends
A variable displacement system of hydraulic drives cons...
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
