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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

Smaller engines can be made more rigid than large ones and may not have （）.

A.through bolts
B.turbo-chargers
C.bed plates
D.columns

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