| 摘要 |
<p>The vehicle (1) has a first carrier module (2) including first and second wheels (3, 4) aligned longitudinally with each other. A second carrier module (6) comprises third and fourth wheels (7, 8) aligned longitudinally with each other. The third wheel is a drive wheel whose center is located close to a bisector of a segment formed by respective centers of the first and second wheels. The fourth wheel is an idler wheel designed to pivot freely around a vertical axis and aligned laterally with one of the first and second wheels.</p> |
