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單項(xiàng)選擇題

Are you testing the（）(液壓艙蓋)?

A. hydraulic hatch cover
B. hydraulic release unit
C. hydraulic oil jack
D. automatic hatch cover

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單項(xiàng)選擇題

Please help me lift the broken （）(墊艙料).

A.material
B.planks
C.mats
D.dunnage

單項(xiàng)選擇題

I think you’d better use the （）(岸吊).

A. derrick
B. heavy derrick
C. shore crane
D. floating crane

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