File:AmCyc Boring - drill bit - screw auger (2).jpg
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AmCyc_Boring_-_drill_bit_-_screw_auger_(2).jpg (90 × 574 pixels, file size: 19 KB, MIME type: image/jpeg)
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DescriptionAmCyc Boring - drill bit - screw auger (2).jpg |
English: Woodcut/drawing of a drill bit for wood in the form of a screw: the screw auger (second version), formed of a flat band of steel twisted when red hot. |
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Date | published 1879 | |||||||
Source | The American Cyclopædia, v. 3, 1879, p. 99 (Fig. 15). | |||||||
Author | Unknown authorUnknown author | |||||||
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current | 17:42, 25 March 2014 | 90 × 574 (19 KB) | Library Guy (talk | contribs) | {{Information |Description ={{en|1=Woodcut/drawing of a drill bit for wood in the form of a screw: the screw auger (second version), formed of a flat band of steel twisted when red hot.}} |Source =''The American Cyclopædia'', v. 3, 1879, p.... |
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