File:AmCyc Boring - Diamond Drill.jpg
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DescriptionAmCyc Boring - Diamond Drill.jpg |
English: Woodcut/drawing of a diamond drill, owned by the American diamond drill company, the bit of which is the invention of Rodolphe Leschot of Paris. It is a rotary machine. There are several patterns and sizes; that represented is a small tunnelling drill. |
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Date | published 1879 | |||||||
Source | The American Cyclopædia, v. 3, 1879, p. 101 (Fig. 21). | |||||||
Author | Unknown authorUnknown author | |||||||
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current | 19:12, 25 March 2014 | 729 × 726 (170 KB) | Library Guy (talk | contribs) | {{Information |Description ={{en|1=Woodcut/drawing of a diamond drill, owned by the American diamond drill company, the bit of which is the invention of Rodolphe Leschot of Paris. It is a rotary machine. There are several patterns and sizes; that re... |
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