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一般工厂中,对铸钢小件的生产均感困难。因为:用单个手工造型,生产效率低,尺寸精度差;而用大型面机械造型,由于浇注距
General factory, the production of small pieces of castings are difficult. Because: with a single manual modeling, low productivity, poor dimensional accuracy; and large-scale surface mechanical modeling, due to the casting distance