1981年3月19～28日冶金部在西安冶金机械厂召开“公差与配合”新国家标准宣贯会,有部属设计院、机械厂和企业机修等90个单位126名代表参加。会议聘请国标工作组成员、西安交大赵卓贤付教授和西安机械厂吴京祥工程师担任主讲,西北农学院杨菁讲师和衡阳、西安冶金机械厂的几位工程师也参加了讲课。会议的任务是培训贯彻新国标的技术骨干,要求 March 19 ~ March 1981 The Metallurgical Department held a new national standard publicity meeting on “Tolerance and Cooperation” in Xi’an Metallurgical Machinery Factory. There were 126 delegates from 90 units, including Design Institutes, Machinery Plant and Enterprise Mechanization. The meeting hired national standard working group members, Xi’an Jiaotong University professor Zhao Zhuoxian and Xi’an Machinery Plant Wu Jingxiang engineer as speaker, Northwest Agricultural College Yang Jing lecturer and Hengyang, Xi’an Metallurgical Machinery Factory several engineers also attended the lecture. The task of the conference is to train and implement the technical backbone and requirements of the new national standard