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“一分三”萃取分离新工艺于1985年11月23日至24日在北京由冶金部和有色总公司共同主持了鉴定。这个萃取新工艺的工业试验是在冶金部包头稀土研究院的研究成果基
The “one and three” extraction and separation process was co-chaired by the Metallurgical Department and Nonferrous Corporation in Beijing from November 23 to November 24, 1985. The industrial process of extraction of new technology is in the Ministry of Metallurgical Research Baotou Rare Earth Research Foundation