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中国有色金属工业总公司长沙公司于六月二十六日至七月二日在湖南有色金属研究所举办环境监测操作技术比赛,总公司在湘
Changsha, China Nonferrous Metals Industry Corporation held an environmental monitoring operation technical competition at Hunan Nonferrous Metal Research Institute from June 26 to July 2, the head office in Hunan