一、有色金属标准化发展历程有色金属标准化工作始于上世纪50年代。几十年来,有色金属标准化工作为国家的经济建设、有色金属产业的发展、高新技术和军工材料的发展都做出了重要贡献。按照国家经济体制的演变过程,有色金属标准化工作大致可分为三个阶段,即计划经济时期、过渡时期、市场经济时期。 First, the development of non-ferrous metal standardization Non-ferrous metal standardization began in the 1950s. For decades, the standardization of nonferrous metals has made important contributions to the country’s economic construction, the development of the nonferrous metals industry, the development of high technology and military materials. In accordance with the evolution of the national economic system, the standardization of non-ferrous metals can be roughly divided into three stages, namely the planned economy period, the transition period and the market economy period.