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| Author | : Lindsay D. Norman |
| Publisher | : |
| Total Pages | : 38 |
| Release | : 1962 |
| Genre | : Manganese ores |
| ISBN | : |
| Author | : John J. Henn |
| Publisher | : |
| Total Pages | : 44 |
| Release | : 1968 |
| Genre | : Manganese ores |
| ISBN | : |
| Author | : Lindsay D. Norman |
| Publisher | : |
| Total Pages | : 42 |
| Release | : 1963 |
| Genre | : Manganese ores |
| ISBN | : |
| Author | : Lindsey D. Norman |
| Publisher | : |
| Total Pages | : 30 |
| Release | : 1962 |
| Genre | : |
| ISBN | : |
| Author | : C. A. Komar |
| Publisher | : |
| Total Pages | : 30 |
| Release | : 1962 |
| Genre | : Coal mine accidents |
| ISBN | : |
| Author | : United States. Bureau of Mines |
| Publisher | : |
| Total Pages | : |
| Release | : 1968 |
| Genre | : |
| ISBN | : |
| Author | : William R. Hardwick |
| Publisher | : |
| Total Pages | : 66 |
| Release | : 1961 |
| Genre | : Beryllium |
| ISBN | : |
Drilling practices at the Silver Summit mine in Shoshone County, Idaho, and the steps taken to increase drilling efficiency are described for the 1952 to 1958 operating period. Mining and development methods are outlined, and drilling equipment and practice are discussed. Cost and performance data include drilling time, bit duty, steel failure, drill repair, and compressed-air consumption. Steps taken to increase drilling efficiency and decrease costs are described, including modifications of bit design, new procedures for drill-rod fabrication and new processes for completing certain drill-machine repairs.
| Author | : United States. Bureau of Mines |
| Publisher | : |
| Total Pages | : |
| Release | : 1963 |
| Genre | : |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 36 |
| Release | : 1968 |
| Genre | : |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 1963 |
| Genre | : |
| ISBN | : |
