Coal Engineering ›› 2022, Vol. 54 ›› Issue (1): 50-56.doi: 10.11799/ce202201009

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Application Research of Roof Cutting Entry Retaining Technology under Gently Inclined Thick Coal Seam Upper Entry

  

  • Received:2021-06-04 Revised:2021-08-11 Online:2022-01-14 Published:2022-07-07

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