Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 36
more nearly we approach it, the nearer will the companion generatrices, and therefore the surfaces,be to each other at any given distance from the element of tangency. Consequently the teeth willinterfere with each other unless one pair be made smaller than the other, even when the axes do nothave…
Mechanical engineering -- Dictionaries
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