COAL ENGINEERING ›› 2014, Vol. 46 ›› Issue (11): 30-32.doi: 10.11799/ce201411010

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Study on the technology of girder truss support for coal roadway at upper limit mining area

  

  • Received:2012-12-14 Revised:2013-02-05 Online:2014-11-11 Published:2014-11-12