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Mechanical drawing for trade schools (1911)
Leeds, Charles Carley, 1870- · New York, D. Van Nostrand company · leaf 62
Ellipse … Parabola cj_ASs Indus!rial trade MachinistNAMC John W.Roberts dateMar.28-07. THE CARNEGIE TECHNICAL SCHOOLS PITTSBURGH, PA. School fxm Apprentices and Journeymen MECHANICAU DRAWING Conic Sections SCALE Full Size DWG. NO. C. 1020 LESSON No. 26. INTERSECTIONS.—The important principle contained in…Mechanical drawing
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