Keyword [upward borehole] Result: 1 - 2 | Page: 1 of 1 1.  Study On The Technology Of Pressure-relief Gas Extracting From Upward Borehole In The Lateral High Drainage Roadway 2.  Experimental Study On Self-sealing Performance Of Uplink Boreholes By Drilling Cuttings For Gas Extraction   <<First  <Prev  Next>  Last>>  Jump to

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