| 摘要 |
A motor vehicle adapted to be driven by its own power source and steered by an operator, having a chassis equipped with an operator seat, front wheel and a pair of rear wheels mounted respectively on a lower surface of the chassis, a motor for driving the front wheel, and a caster provided between the chassis and each of the rear wheels. The caster supports the rear wheels turnably around an axis extending in a direction intersecting a shaft of the rear wheels. Instead of using the caster, A sphere member being rotatable with respect to the chassis can be used as the rear wheel.
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