单项选择题
A. automatic hatch cover B. folding type cover C. hatch coaming D. side-rolling type cover
Are you testing the（）(液压舱盖)?A. hydraulic hatch coverB. ...
单项选择题Are you testing the（）(液压舱盖)?
A. hydraulic hatch cover B. hydraulic release unit C. hydraulic oil jack D. automatic hatch cover
Please help me lift the broken （）(垫舱料).A.materialB.plan...
单项选择题Please help me lift the broken （）(垫舱料).
A.material B.planks C.mats D.dunnage
I think you’d better use the （）(岸吊).A. derrickB. heavy ...
单项选择题I think you’d better use the （）(岸吊).
A. derrick B. heavy derrick C. shore crane D. floating crane
