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Keyword [extremely close distance]
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1. Study Of Lower Coal Seam Roadway Layout And Supporting On The Extremely Close Coal Seam Group
2. Study On Layout And Support Design Of Track Lane Under Working Face In Extremely Close Distance Of Coal Seam Goaf In South Nine Mining Area Of Duerping Mine
3. Study On The Layout Of Roadway And Supporting Technology For The First Mining Face Of 4-2 Coal Seam Under The Extremely Close Goaf In Bailu Mine
4. Study On Gob-side Entry Retaining Of Ascending Ming In Gently Inclined And(extremely) Close Thin Coal Group
5. Research On Failure Characteristics And Control Ways Of Roadways Extremely Close Distance Coal
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