Because after being drawn the edge of a drawing piece is no flattening generally, and it needs edge trimming to meet the demand, usually realized by side-cutting and turn-cutting dies – Chinese translation

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Because after being drawn the edge of a drawing piece is no flattening generally, and it needs edge trimming to meet the demand, usually realized by side-cutting and turn-cutting dies

由于拉伸件在拉伸后边缘不平整，一般需要修边才能达到要求，通常采用侧切和旋切模实现

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