Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 347
1401. SCREW THREADS, Trape-zoidal thread. Angle 90° face, 45° back.Depth equals 0.75 of the pitch. 35^ MILL AND FACTORY APPLIANCES. … POWELLS t P >iTHREAD
Mechanical movements
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