commutator bar造句
造句与例句手机版
- They started as repulsion motors, but once they were running at a sizable fraction of full speed, the brushes were lifted mechanically and all commutator bars were short-circuited together to create the equivalent of a squirrel-cage induction motor.
- It's difficult to see commutator bar in a sentence. 用commutator bar造句挺难的
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