Coal Engineering ›› 2021, Vol. 53 ›› Issue (2): 95-98.doi: 10.11799/ce202102019

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Research on Dynamic Control of Gas in Fully Mechanized Caving Face of Hard Roof with Extra Thick Coal Seam

  

  • Received:2019-12-10 Revised:2020-04-27 Online:2021-02-20 Published:2021-05-10

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