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六月二十二日至二十四日在苏州由冶金部军工办委托上海冶金局主持的20KC开关电源用非晶铁芯材料通过部级技术鉴定;与此同时还通过了比例电磁头高导磁材料的局级技术鉴定和高纯钨粒助熔剂材料企业级技术鉴定。 参加这次技术鉴定会议的代表来自北京冶金部钢铁研究总院、北京冶金研究所、抚顺钢厂、大冶钢厂、航天部四○九所、电子
June 22 to 24 in Suzhou by the Ministry of Metallurgical Military commissioned by the Shanghai Metallurgical Bureau presided over the 20KC switching power supply with amorphous core material through ministerial technical appraisal; at the same time also passed the proportion of high-head electromagnetic Bureaucratic identification of magnetic materials and high-purity tungsten flux material enterprise-level technical appraisal. Representatives attending the technical appraisal meeting came from Beijing Iron and Steel Research Institute of Metallurgical Department, Beijing Institute of Metallurgy, Fushun Steel, Daye Steel, Space Department 409, Electronics