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Coal Mining Methods China

China scientific books drawing album of the coal mining methods used in china - author: xu yongqilanguage: chinese with english summarypublished on: 1990-01hardcoverthe developing history and up-to-date state of coal mining methods applied in chinas coal mines sice 1949 have been summarized in this book.Totally 193 tapical examples, which are applied effectively now and of .

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