... AC earth relay 交流接地继电器 AC electromagnet 交流电磁铁 AC equivalent capacitance 交流等效电容 ...
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AC electromagnet for valve 阀用交流电磁铁
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Rotating magnetic field is not caused by mechanical methods, but in AC pass in a few of the electromagnet, the nature of its magnetic cycle of change can be seen as rotating magnetic field.
转动磁场并不是用机械方法造成的，而是以交流电通于数对电磁铁中，使其磁极性质循环改变，可看作为转动磁场。
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