COAL ENGINEERING ›› 2017, Vol. 49 ›› Issue (7): 145-148.doi: 10.11799/ce201707043

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  • Received:2017-02-27 Revised:2017-03-30 Online:2017-07-09 Published:2017-07-26
  • Contact: zhang jia E-mail:zj7320@126.com

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