4

1991

(Summary description)At 10:00 on November 1st, the first human tricycle was born in anticipation, which solved the problem of low efficiency of human push and pull vehicles.

1991

(Summary description)At 10:00 on November 1st, the first human tricycle was born in anticipation, which solved the problem of low efficiency of human push and pull vehicles.

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At 10:00 on November 1st, the first human tricycle was born in anticipation, which solved the problem of low efficiency of human push and pull vehicles.

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