Redirected from 508 BC
Decades: 550s BC - 540s BC - 530s BC - 520s BC - 510s BC - 500s BC - 490s BC - 480s BC - 470s BC - 460s BC - 450s BC
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... one finds the "rolling" point, but the gyro will also be accelerated to a smaller extent by the slipping friction. The device is covered by US patents 3,726,146 ...