单项选择题
A. derrick B. union purchase C. topping lift block D. crane
The （）(包装货) is loaded and unloaded by cargo sling.A. ba...
单项选择题The （）(包装货) is loaded and unloaded by cargo sling.
A. bagged cargo B. packed cargo C. cased cargo D. deck cargo
The（）(折叠式舱盖) can fold slowly.A. rolling type hatch cove...
单项选择题The（）(折叠式舱盖) can fold slowly.
A. rolling type hatch cover B. side-rolling hatch cover C. folding type hatch cover D. automatic hatch cover
The（）(侧滚式舱盖) runs along the guide rail.A. rolling type ...
单项选择题The（）(侧滚式舱盖) runs along the guide rail.
