Three Wheeled Vehicle
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A tricycle is a three wheeled vehicle, while tricycles are often associated with the small three wheeled vehicles used by pre school age children, they are also used by adults for a variety of purposes. in the United States and Canada, adult sized tricycles are used primarily by older persons for recreation, shopping, and exercise.
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Human-Powered TransportationSource
Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)
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