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单选题
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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单选题If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.A
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