A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 130
Fig:. 130 … disk, although sometimes cyHndrical in shape. Har-vesters, printing presses, sewing machines, looms andsteam-valve mechanisms employ a considerable use A PRACTICAL COURSE IN
Mechanical drawing
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