File:AmCyc Boring - drill bit - American auger.jpg
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AmCyc_Boring_-_drill_bit_-_American_auger.jpg (90 × 563 pixels, file size: 18 KB, MIME type: image/jpeg)
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DescriptionAmCyc Boring - drill bit - American auger.jpg |
English: Woodcut/drawing of a drill bit for wood in the form of a screw: the American auger, made of a solid shaft, around which is a thin helical fin. It much resembles a wood screw; the cutting edge is
removable, and resembles that of a centre bit. |
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Date | published 1879 | |||||||
Source | The American Cyclopædia, v. 3, 1879, p. 99 (Fig. 16). | |||||||
Author | Unknown authorUnknown author | |||||||
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current | 17:49, 25 March 2014 | 90 × 563 (18 KB) | Library Guy (talk | contribs) | {{Information |Description ={{en|1=Woodcut/drawing of a drill bit for wood in the form of a screw: the American auger, made of a solid shaft, around which is a thin helical fin. It much resembles a wood screw; the cutting edge is removable, and res... |
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