... engraving. For the description of this I am again indebted to Mr. J. Bucknall Smith's before-mentioned work. "According to this arrangement the rolls D and E are superimposed so that a bar or rod passed through the first or top set is turned backwards...
A Treatise Upon Wire, Its Manufacture and Uses, Embracing Comprehensive ... - Page 46
by J. Bucknall Smith - 1891 - 347 pages
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