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An introduction to machine sketching and drawing for industrial and technical schools (1917)
Toronto : Copp, Clark · leaf 60
V-Thread U.S.Sfand-. Square Acme WormSiS. Buttress WhitworTh Bolts, Stu-ds and Jachs.Presses, Feed Screws Worm Vises. Lathes. British Cabscreu/s ^a/ye6pind/es. on lathes .etc. Gears. Gun Racks. Standard. Conventional Threads.Mechanical drawing
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