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Keyword [hole collapse]
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1. Cold Forming Process Analysis Of Flange Weld Nut
2. The Research On A Total Length Of Screen Guard And Hole Sealing Technology With Pressure In Soft Coal Seam
3. Research And Design Of Real - Time Monitoring And Diagnosis System For Coalbed Methane Horizontal Well Shaft Wall Collapse
4. Investigation And Study Of Goaf In Western Guizhou Coal Mine Based On InSAR Technology
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