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 11
wheels having no pitch-surfaces properly so called, although in constructing them surfaces of somekind must be provided in which to secure the teeth. The following table exhibits in a manner convenient for reference the peculiar features of the dif- … ?068.
Mechanical engineering -- Dictionaries
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