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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 > 船舶电气与船舶安全

单项选择题

Brushless generators are designed to operate without the use of（）.

A.brushes
B.slip rings
C.commutators
D.all of the above

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