Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 144
^^a a \^i Fig. 188 is cut into quarters, and the four pieces e, e, e and e make thequarter turns for the two halves of the double pattern. The ends, inchtding the core prints and connecting tenons, are
Mechanical engineering -- Dictionaries
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