COAL ENGINEERING ›› 2013, Vol. 45 ›› Issue (s1): 1-3.doi: 10.11799/ce201308051

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Research on reasonable length of fully mechanized mining face androof control technology in hard roof

  

  • Received:2013-05-15 Revised:2013-06-28 Online:2013-08-12 Published:2013-08-12