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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

Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.

A.cylinder covers
B.lubricating space
C.crosshead
D.exhaust manifold

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