| 摘要 |
Teaching and evolutionary tricycle intended for young children. In the basic version, without the pedalling system, it comprises a rear axle in the shape of a fork, a hoop, a portal structure or inverted U which leaves space between the rear wheels for the feet of the child. Removable pedals can be added to it on the front wheel and a central casing carrying transmission to the back wheels. This tricycle makes it possible to separate, in time, the learning of steering and that of pedalling. <IMAGE>
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