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Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
2 results returnedPublished Year
Subject
- Blasting (2) *
- Boring machinery (2)
- Diamond bits (2) *
- Rock-drills (2)
- Magnetite mines and mining--Equipment and supplies (1)
- Mines and mineral resources--Pennsylvania--Centre--Equipment and supplies (1)
Author
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