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Keyword [Hard coal seams]
Result: 1 - 3 | Page: 1 of 1
1.
Mechanism And Application Of Pressure Relief And Permeability Enhancement High Pressure Water Jet Drilled In Soft-hard Coal Seams
2.
Research On Optimization Of Coal Pillars In Section Of Fully Mechanized Mining Face In Near Shallow Buried Thick Bedrock "Three Hard" Coal Seams
3.
Research On Breaking Characteristics Of Hard Coal With High-pressure Water Presplitting And Cutting Picks
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