Dunkerley, Stanley, 1870- · London, New York [etc.] Longmans, Green · leaf 43
Fw. 39. Fig. 40. fixed, the displacement of every point in the third ply is the sameas that in the second, and is therefore equal to twice the displace-ment of the running block. Thus, the velocity ratio of haul to liftis two, and the arrangement is termed a twofold purchase. It wiUbe noticed that…
Machinery, Kinematics of
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