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When hoisting a boat on gravity type davits using an electric motor driven winch，the davit arms should be brought up（）.
A:to their final position with the winch operating at slow speed
B:to the bar stop，and then hand cranked to their final position
C:until just before they make contact with the limit switch，and then hand cranked to their final position
D:to the embarkation deck，and then hand cranked to their final position

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出自：海船船员证

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