COAL ENGINEERING ›› 2013, Vol. 45 ›› Issue (12): 72-74.doi: doi:10.11799/ce201312026

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Research on evaluation index system of the world first-class surface coal mine

  

  • Received:2013-06-12 Revised:2013-07-14 Online:2013-12-10 Published:2013-12-10