| 摘要 |
<p>The column has a crash blocking mechanism with blocking units (6,7) connected with operating and holding units. One unit has a segment projecting from a surface of the blocking unit and the other unit has a recess.The segment lies in an area of the recess in a closed condition of a fixing unit during through-slipping of the operating unit opposite to the holding unit and extends into the recess and lies opposite to an edge of the recess.</p> |
