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The first wheels were used for shipping purposes appeared in around 3200 BC. The experts said that the wheel is the Mesopotamia fitting into a horse.The wheel is the details of many technology machinery and means of transport in the form of disk or cover rim spokes. The function of the wheel is transmitted and transforms the rotary motion. In technology, the wheel is used to change the frequency with the transmission belts, gears, screw ... or redirected motion, or the motion between two shafts. It is the ancient and fundamental to the point that everyone considers the presence of it is naturally. Make sure that no one wants to live that lack useful tools such as wheel at all.
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