为改变铸造行业落后面貌,总结交流一机系统无箱挤压造型经验,设计大型无箱挤压造型机,于74年12月20日至27日在上海马铁厂召开了座谈会。这次会具体由一机部铸造服务组、上海市机电一局铸造行业组、沈阳铸造研究所、上海马铁厂筹备和主持。参加单位39 In order to change the backwardness of the foundry industry and to sum up the experiences of exchanging the experience of a boxless extrusion molding machine with a single machine, a large scale boxless extrusion molding machine was designed and a symposium was held in Shanghai Magang Factory from December 20 to 27, The meeting will be specifically made by a machine casting service group, Shanghai Municipal Bureau of Electrical and Mechanical Foundry Industry Group, Shenyang Foundry Institute, Shanghai Iron and Steel plant preparation and hosting. Participating units 39