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Keyword [drainage safety]
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1. Study On Some Safety Problems Of The Daye Iron Deep Open-pit-mine Transferring To Underground Mining
2. Study On The Safety Of Gas Drainage System
3. Study On Gas Presence Law And Prevention And Control Technology In Dongjiahe Mine Branch's Second Level And Second Acquisition Area
4. Research On Mechanism And Technology On Enhanced Drainage By Large Hole Drilling In Soft And Low Permeability Coal Seam
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