A rotating commutator on the dc machine, used as an exciter, was a common means for achieving rectification in the past.
在过去，直流励磁机上的旋转整流子是用作整流的普遍措施。
The rotating weight exciter even has been used in its simplest form as a single arm device.
旋转重物激振器甚至曾经以单臂装置这样最简单的形式使用过。
The rotating weight exciter even has been used in its simplest form as a single arm device.
旋转重物激振器甚至曾经以单臂装置这样最简单的形式使用过。
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