中国稀土永磁行业翘楚 中科三环北京工厂掠影
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中国网 2014-12-26
中科三环青年用废旧的稀土永磁材料制作的工艺品 。[中国发展门户网 王振红 摄]
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中国稀土永磁行业翘楚 中科三环北京工厂掠影
中国网
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