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A comment on Low Tech Magazine: The Chinese Wheelbarrow.

Re:Low Tech Magazine: The Chinese Wheelbarrow by adolph on Tuesday July 24, 2012 @10:18AM (#4285768)
The one-wheeled vehicle appeared around the time the extensive Ancient Chinese road infrastructure began to disintegrate. Instead of holding on to carts, wagons and wide paved roads, the Chinese turned their focus to a much more easily maintainable network of narrow paths designed for wheelbarrows.

Necessity and constraints are parents of invention I suppose.

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