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Keyword [extraction radius]
Result: 21 - 25 | Page: 2 of 2
21.
Research On Key Technology Of Gas Extraction By Large Diameter Drilling In Coal Seam
22.
Research On The Effective Extraction Radius Of Gas Extraction Drilling Based On Hydraulic Punching Technology In Xinzhuang Coal Mine
23.
Pore Morphology And Permeability Evolution Characteristics Of Hydraulic Punching In Low Permeability Coal Seam
24.
Research On Characteristics Of Effective Gas Extraction Radius Of Coal Seam Drilling Along Seam
25.
Research On The Gas Extraction Radius Of Multi-coal Seam Drilling In Qinglong Coal Min
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