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异形拉丝属于冷挤压范围,它是一种无切屑加工方法。金属坯料通过模腔强力拉出,使坯料在腔壁内受到很大压力,产
Profiled drawing is cold extrusion range, it is a non-chip processing methods. Metal billet through the cavity strong pull out, so that the billet in the cavity wall under great pressure, production