机械工程学会北京分会和本刊编辑部在4月6日联合召开“扩大球墨铸铁应用范围”的座谈会,应邀出席的有北京地区的高等学校、工厂、机关的工作同志和天津车辆弹簧厂的代表.会上讨论了各厂推广球墨铸铁方面的情况,分析了目前推广中的主要问题是球墨铸铁质量 On April 6, the Mechanical Engineering Society Beijing Branch and the editorial department jointly held a symposium on “Expanding the Application of Ductile Iron”. Attendance was invited to attend the work of comrades in colleges, factories and agencies in Beijing and the workshop of Tianjin Vehicle Spring Factory Representative of the meeting discussed the promotion of ductile iron factory situation, analysis of the current promotion of the main problem is ductile iron quality