File:AmCyc Boring - drill bit - twisted gimlet.jpg
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| Description |
English: Woodcut/drawing of a drill bit for wood in the form of a screw: the twisted gimlet, made of a conical shaft, around which is cut a half-round spiral groove |
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| Date | published 1879 | ||||||
| Source | The American Cyclopædia, v. 3, 1879, p. 99 (Fig. 13). | ||||||
| Author | Unknown author | ||||||
| Permission (Reusing this file) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:27, 25 March 2014 | | 60 × 568 (12 KB) | Library Guy | {{Information |Description ={{en|1=Woodcut/drawing of a drill bit for wood in the form of a screw: the twisted gimlet, made of a conical shaft, around which is cut a half-round spiral groove}} |Source =''The American Cyclopædia'', v. 3, 187... |
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