...007,21 (3)j 35& CHENG Yong-sheng,CHEN Song-ling(成永生,陈松岭).Mining Research and Development(矿业研究与开发),2007,27(3):53. LING Juan,TANG Ju-xing,LI Zhi-jun,et al(凌娟,唐菊兴,李志军。
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mining research and development review 矿业研究与开发评论
mining research and development
矿业研究与开发
以上为机器翻译结果,长、整句建议使用 人工翻译 。
Mining companies spent little on research and development, or on exploration, in the 1990s and were slow to get going again.
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