今年四月,部第二技术交流站在四二○厂就发动机工厂标准小零件的冷热镦工艺进行了交流讨论。参加会议的有厂、所、院校18个单位的代表。无产阶级文化大革命以来,航空发动机标准小零件采用冷热镦新工艺取得了很大进展。据与会的8个单位不完全统计,目前已有438 In April this year, the Second Technical Exchange Station of Ministry of Science held an exchange discussion on the hot and cold upsetting process of standard small parts of the engine factory at 420 Factory. Participate in the meeting of factories, institutes and institutions 18 units of representatives. Since the Great Proletarian Cultural Revolution, great progress has been made in adopting the new technology of hot and cold heading for the small parts of aeroengines. According to incomplete statistics of the eight units present, there are now 438