Bearings
In ancient times, bearings may have taken the form of roller (cylindrical) bearings in the wheel hubs of wagons or, more probably, of a conveyor-belt system of logs designed by the Egyptians ...
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Bearings
A world without bearings would look far different. Although rarely noticed, bearings are ubiquitous: computers have a few, electric appliances contain several, and an automobile has hundreds....
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Bearings
Bearings