水手经常保养锚机。（）<br>A:Sailors often maintain the derrick.<br>B:Sailors often maintain the winch.<br>C:Sailors often maintain the windlass.<br>D:Sailors often maintain the machine.

水手经常保养锚机。（）
A:Sailors often maintain the derrick.
B:Sailors often maintain the winch.
C:Sailors often maintain the windlass.
D:Sailors often maintain the machine.

出自：船舶水手证

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