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通过分析，认为严格优选生铁资源并控制生铁中Ｍｎ、Ｐ、Ｓ含量，同时注意正确使用焦炭和球化剂是生产优质球铁件的关键所在。
Through the analysis, we believe that strictly controlling pig iron resources and controlling the contents of Mn, P and S in pig iron, and paying attention to the proper use of coke and nodulizer are the key points to produce good quality ductile iron.