单项选择题
A.360° B.270° C.180° D.90°
Deck cranes require（） time to prepare for working cargo...
单项选择题Deck cranes require（） time to prepare for working cargo than derricks.
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
