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Concept of rounds

Any simple and profound invention has not appeared out of nowhere in the minds of people, there must be what triggers inspiration. Just as the ancient wood which is seen floating in the water and canoe, the invention of the wheel may also be inspired by nature. Huainanzi said our ancestors "Erigeron turn known as". "Erigeron" is a kind of grass, high foot stems, leaves, and roots into the light. Strong winds, are easily uprooted, rotating in the wind. The ancients may be inspired by this phenomenon, invented the wheel and axle. Lu Ban invented inspired by saw grass and saw legends, this is probably a myth. Because the wheel is a prototype in nature.

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