Keyword [pressure relief and permeability increase] Result: 1 - 3 | Page: 1 of 1 1.  Technology Research On The Through Beds Hole With Improving Permeability And Relieving Pressure At High Drainage Roadway In Pan Ⅱ Coal Mine 2.  Study On The Change Law Of The Influence Range Of The Drilling Hole In The Coal Bed Of Machi Coal Mine 3.  Mechanism And Application Of Pressure Relief And Permeability Enhancement High Pressure Water Jet Drilled In Soft-hard Coal Seams   <<First  <Prev  Next>  Last>>  Jump to

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