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一九七三年十一月二十日到二十八日由天津市焊接研究所和北京金属结构厂主持召开了华北地区 CO_2气体保护焊接经验交流会。这次会议是在天津市科技局、天津市第一机械工业局的直按领导和支持下召开的。出席这次会议的有来自50多个单位的95名代表。会前,天津市焊接研究所、北京金属结构厂等单位对京、津两市和山西、内蒙、河北三省的20多个工厂、大专院校、科研单位
From November 20th to 28th, 1973, the Tianjin Welding Research Institute and Beijing Metal Structure Factory presided over the CO2 gas protection welding experience exchange meeting in North China. The meeting was held under the direct leadership and support of Tianjin Science and Technology Bureau and Tianjin No. 1 Machinery Industry Bureau. Attending this meeting were 95 delegates from over 50 units. Before the meeting, the Tianjin Welding Research Institute, Beijing Metal Structure Factory and other units across Beijing, Tianjin and Shanxi, Inner Mongolia, and Hebei Provinces had more than 20 factories, universities and research institutes.