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 212
The angular motion of the collars of the side rolls, caused by the obliquity of their axes, producesa forward motion in the bar to be rolled, and thus it is passed through from one end to the other.The upper and lower rolls act merely as guides to keep the bar in place between the side rolls.…
Mechanical engineering -- Dictionaries
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