Search
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
4 results returnedSearch results
- Technique of surveying diamond-drill holes with the Wright Radiolite Borehole-Surveying Instrument
- A device for placing a borehole deformation gage in a horizontal hole
- Economic evaluation of borehole and conventional mining systems in phosphate deposits
- Borehole (slurry) mining of coal, uraniferous sandstone, oil sands, and phosphate ore