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根据一机部新产品试制计划的安排,宁江机床厂自行设计和试制了TG4120B TG4132B TG4145B单柱立式光学座标镗床系列,在华光仪器厂、岷江电器厂协作下,于1979年11月进行了工厂鉴定。四川省机械局受一机部委托邀请了全国同行业工厂、有关的研究单位、用户单位和协作工厂等十三个单位七位代表组成国家鉴定委员会,于1979年12月15～24日在灌县宁江机床厂对单柱座标镗床系列样机进行了国家鉴定。
According to the arrangement of the new product trial production plan of the First Machine Department, Ningjiang Machine Tool Factory independently designed and prototyped the TG4120B TG4132B TG4145B single-column vertical optical coordinate boring machine series. In collaboration with Huaguang Instrument Factory and Qijiang Electric Appliance Factory, in November 1979, Factory inspections were conducted. The Machinery Bureau of Sichuan Province was invited by the Ministry of Machine Building to invite seven representatives from 13 factories in the same industry factories, research institutes, user units, and collaboration factories to form a national appraisal committee, and took irrigation from December 15 to 24, 1979. Ningjiang Machine Tool Factory of the county carried out the national appraisal of the single-column coordinate boring machine series prototype.