前言在伟大领袖毛主席关于“抓革命,促生产”的伟大方针指引下,特别是在当前批林批孔运动深入开展的大好形势下,大大促进了我国工农业生产的飞跃发展。为了进一步实现少无切削新工艺,以达到节约原材料,提高劳动生产率,改善产品质量以及缩短工艺流程,一九七四年初上海机配公司与交通大学举办的冷挤压短训班结合 Foreword Guided by the great guideline of Chairman Mao Zedong on “grasping the revolution and promoting production,” especially under the current excellent situation of carrying out the proletarian and pital ideological campaigns, we have greatly promoted the rapid development of our country’s industrial and agricultural production. In order to further reduce the number of non-cutting new processes, in order to save raw materials, improve labor productivity, improve product quality and shorten the process flow, in early 1974, Shanghai Machine Assembly Company and Jiaotong University held a cold extrusion short course