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ꯐꯥꯏꯜ:Middletown milling machine 1818--001.png

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Unknown authorUnknown author
Licence
Public domain
Source
Original unknown. Known to have been published and borrowed for republishing repeatedly at least by 1906 and probably before. Appeared in the American Machinist journal and several books.
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Three-quarter-ten
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https://commons.wikimedia.org/wiki/File:Middletown_milling_machine_1818--001.png

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current04:44, 14 July 2010
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৬৯০ × ১৯৫ (২৫ KB)smartcommons>Three-quarter-ten{{Information |Description=Line drawing of a milling machine in use in a firearms factory in Middletown, Connecticut, USA, by 1818. It was described by E.G. Parkhurst, who had seen it in 1851 and gathered information about it then from Robert Johnson, who

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