| 摘要 |
<p>The truck has a steerable chassis on three or more wheels, and also supports for the seat surface. These supports are solid, and provide a support in the travel direction at least when the truck is in use. They can be bowl-shaped, and a further support can be provided for the user's torso. They can be adjustable for height, and arm-supports can be included, while one or more supports can be detachable.</p> |
