Who Invented Gears And When

See Who Invented Gears And When Below….

Hero of Alexandria Invented Gears.
Gears was invented between 150 and 100 BC.
Gears is a rotating machine part having cut like teeth, or cogs, which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source. 

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