电火花加工的表面与切削加工的表面有很大区别。
The surface has great difference between the spark machining and the cutting.
电火花可切削材料，不论其硬度或韧性，但仅限于导电工件材料的加工。
EDM can cut materials regardless of their hardness or toughness, but is limited to the machining of electrically conductive workpiece materials.
模具的切削、磨削、车挤、滚压和电火花加工的质量是对模具寿命的影响的因素。
This paper deals with quality of machining for die including grinding, extrusion, surface rolling and electrical machining.
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