COAL ENGINEERING ›› 2016, Vol. 48 ›› Issue (2): 1-4.doi: 10.11799/ce201602001

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Study on the optimization for the drawing technique oflongwall top-coal caving inextra-thick coal seam condition based on BBR system

  

  • Received:2016-03-07 Online:2016-02-10 Published:2016-03-07

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