| 摘要 |
<p>The device has two rotation control units (3, 4) acting in opposite directions, and a piston (11) including a retaining unit (2) that comprises of an energy-absorbing steering column (20) formed of an axle (21) and a sleeve (22). The rotation control units selectively place the retaining unit in a blocking configuration, in axial translation, or in an axial slide free configuration.</p> |
