COAL ENGINEERING ›› 2018, Vol. 50 ›› Issue (12): 66-68.doi: 10.11799/ce201812017

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  • Received:2018-09-13 Revised:2018-11-02 Online:2018-12-20 Published:2019-03-19
  • Contact: lirunzhi lirunzhilirunzhi E-mail:369710751@qq.com

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