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Keyword [high level boreholes]
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1. Research On Gas Control Of Fully Mechanized Working Face In Gushuyuan15th Coal Seam
2. The Experiment And Study On The Gas Drainage By High Level Boreholes In Shuilian Coal Mine
3. Research On Gas Drainage Effects Of High Level Drainage Roadway On The Strike And High Level Boreholes In Fullly Mechanized Mining Face
4. The Optimization And Applied Research Of Goaf Gas Extraction Technology About Hard Roof Comprehensive Mechanized Coal Mining Face
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