为了贯彻毛主席工业“以钢为钢”的方针,深入开展优质、高产、低消耗为主要内容的增产节约运动,进一步提高球铁质量和扩大应用范围,促进铸造生产技术的发展,辽宁省机械局于1972年6月24日至30日在赤峰市召开球墨铸铁经验交流会议。参加会议的有来自工厂、机关、学校和科研部门110个单位代表168名。 In order to carry out Chairman Mao’s principle of “using steel as a steel”, we should deepen the campaign of saving production and saving with the main content of high quality, high output and low consumption, further improve the ductile iron quality and expand the application range, and promote the development of foundry production technology. Liaoning Machinery Council in June 1972 from June 24 to 30 in Chifeng held ductile iron experience exchange meeting. Attending the meeting were from factories, institutions, schools and research institutes 110 units representing 168.