File:EB11 Screw - section of grinding nut.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:55, 29 August 2013 | 953 × 455 (93 KB) | Bob Burkhardt | {{Information |Description={{en|A cross-section of a nut for grinding a precision screw.}} |Source=''Encyclopædia Britannica'' (11th ed.), v. 24, p. 481, fig. 9; see also the 9th ed., v. 21, p. 553, fig. 1. |Date=published 1886 and 1911 |Author=Henry... |
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