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單項選擇題

The safe working load of the （）is 100 tons.

A.single derrick
B.derrick
C.heavy derrick
D.deck

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單項選擇題

Swing the （）to starboard side, please.

A.winch
B.derrick
C.crane
D.deck

單項選擇題

（）away the guy.

A.Pay
B.Haul
C.Adjust
D.Take