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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶动力装置

单项选择题

Before starting the engine the air bottle should be （）.

A.pumped up
B.loaded
C.discharged
D.opened

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单项选择题
Before replacing a piston you should check the rings to see that all clearances and gaps are within the permissible （）.

A.deflection
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Before replacing a piston you should check the rings to see that all clearances and gaps are （） the permissible tolerances.

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Before replacing a piston you should check that all rings are （）.

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