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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

In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.

A.the outlet of oil
B.the outlet of water
C.the bowl periphery
D.the center of bowl

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