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Keyword [ultra-close]
Result: 21 - 24 | Page: 2 of 2
21.
Study On Reasonable Mining Method Of 11# Ultra-close Coal Seams In Taishanlongan Coal Mine
22.
Research On Roadway Deformation Affected By Multiple Mining Under Coal Pillar For Ultra-Close Multi-Seam In Da Liuta
23.
Study On Deformation Control Mechanism Of Shaft Under Solid Backfilling Mining In Ultra Close Multiple-seams
24.
Research On Migration Characteristics Of Overlying Strata And Optimization Of Staggered Distance In Ultra-close Coal Seams
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