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Household physics (1919)

Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 247

An illustration from Household physics, 1919, leaf 247
Figure 248. — Ball Bearings ReduceFriction and Increase the Efficiency. 236 MACHINES

Physics

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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