单项选择题
Don’t operate two or more hatch （）at the same time.
A.caps
B.levers
C.covers
D.coamings
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相关考题
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单项选择题
（）-speed operation and rough handling of covers are dangerous.
A.Low
B.High
C.Slow
D.Quick -
单项选择题
In order to avoid shock, reduce the speed by （）.
A. control level
B. control panel
C. inching control
D. low speed -
单项选择题
According to the customs of the port, hatch covers are to be operated by （）.
A.stevedores
B.watchmen
C.winchmen
D.foremen
