Tricycle manufacturing.
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Previously:
1875 Belvallette dog-powered tricycle - photo
1896 giant mechanical tricycle - photos
1898 De Dion Bouton tricycle - photo
1935 Sky King tricycle - photo
1940 Hensel steam tricycle - photo
Camaro tricycle - photos
Harley-Davidson tricycle trailer - photo
Tricycle dump truck wheelie dumping - GIF
