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Mechanical movements, powers and devices (1907)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 348
A^A 139^- SCREW THREADS.—Standard V thread, sharp at top and bottom. Depthequals 0.85 of the pitch. Angle 60°. U.S.S. THREAD … WHITWORTH THREAD !/Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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