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1前言随着塑料工业的不断发展,对塑料模具钢也提出了更高的要求。世界上有些国家塑料模具钢已逐步发展成为一个专门的系列,但在我国至今塑料模具钢尚无定型
1 Introduction With the continuous development of the plastics industry, plastic mold steel also put forward higher requirements. Some countries in the world of plastic mold steel has gradually developed into a special series, but in our country so far no plastic mold steel