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Keyword [spiral drill pipe]
Result: 1 - 4 | Page: 1 of 1
1.
Research On Key Technology Of Soft Coal Seam Drilling
2.
Research On Key Technologies Of Mine Tunnel Drilling Rig And Its Drilling Tools
3.
Research On Technology Of Drilling Tools And Hole Formation In Soft Coal Seam
4.
Structure Design And Chip Removal Performance Research Of BTA Internal Spiral Drill Pipe
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