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 570
idered to be a horizontal line; twoother small portions may be considered as parts of vertical dotted lines; and the intermediate partsof the semicircle merge from the horizontal to the vertical line. The reason why one moulding-plane figured to the half-round cannot, under the usual…
Mechanical engineering -- Dictionaries
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