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根据球铁件凝固原理，对常用温砂铸型中制造球铁件（模数在4.8mm－25mm之间），用计算机完成控制压力胃口的设计，流程框留适于各工厂和车间之用．
According to the solidification principle of ductile iron pieces, ductile iron pieces (modulus between 4.8mm-25mm) are commonly used in the production of common warm sand molds, and the design of pressure-controlled appetite control is completed by a computer, and the process box is suitable for use in various factories and workshops .