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 209
wasteH k J of labor, in returning the bar tj Jj over the top roll by the common system of rolling in the two-highmill, is completely avoided in thethree-high mill, which reduces inboth directions. The three-highmill has come into most exten-sive use in the United States.For rolling plate, the…
Mechanical engineering -- Dictionaries
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