| 摘要 |
<p>The device (1) has a front longitudinal rail that is supported by a series of posts (5) drawn from the ground. Each post is allowed to rest on a shoe (2) or thick metal plate that is completely distinct from the ground such that the device moves back on the ground while slipping under the effect of a frontal shock exceeding a certain threshold. A dorsal basket (8) is placed above the shoe, where the dorsal bracket forms a receptacle to receive more or less heavy ballasting loads. The basket is fixed firmly at the posts.</p> |
