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1984年4月25～26日中国有色金属工业总公司科技部和冶金工业部科技司在浙江东风萤石公司召开了“φ150毫米旋流细筛”技术鉴定会。参加会议的有国家科委成果局、浙江省冶金工业总公司和有关高等院校、科研、设计、厂矿等28个单位共48名代表。φ150毫米旋流细筛的研究、试验工作是由北京矿冶研究总院与浙江东风萤石公司共同完成的。到会的代表听取了北京矿冶研究总院和东风萤石公司
April 1984 25 ~ 26 China Nonferrous Metals Industry Corporation Ministry of Science and Technology and the Ministry of Metallurgical Industry Science and Technology in Zhejiang Dongfeng fluorite company held a “φ150 mm swirl fine sieve” technical appraisal. There were 48 delegates from 28 commissions of the State Science and Technology Commission, the Zhejiang Metallurgical Industry Corporation, and relevant institutions of higher learning, scientific research, design, factories and mines. φ150 mm swirl fine sieve research, test work by the Beijing Institute of Mining and Metallurgy and Zhejiang Dongfeng fluorite company to complete. The representatives to attend the Beijing Mining Research Institute and Dongfeng fluorite company