A discharge of built up electrical charge, often forming a spark to a point of lower charge or earth.
充电电荷的放电现象，经常在电荷较低的部位或接地处形成火花。
The forming mechanism of different micro structures fabricated by micro electrical discharge machining (EDM) deposition was studied.
对微细电火花沉积加工中沉积所得不同微细结构的成形机理进行了研究。
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