long distance lower protective seam - Globe Thesis

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Keyword [long distance lower protective seam] Result: 1 - 3 \| Page: 1 of 1
1.	Rational Protection Range Of Lower Protective Layer And Application In Pressure-relief Gas Extraction
2.	Study On Deformation Law Of Coal-rock Mass And The Protection Range Of Under Underside Protective Seam
3.	Study On Seepage Law And Application Of Long-distance Lower Protective Seam Mining
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