| 摘要 |
<p>A supporting and guiding means comprises a centrally disposed closed support column (6) at the upper end of which at least one slide tube (1) is secured paraxially. A holding and guiding device (2) is arranged on said slide tube and retaining plates (4) act at the ends of said device, the retaining plates (4) engaging in the upper open end of at least two insulators (7) arranged outside of the support column and, upon shrinking of the insulators (7), following the shrinking movement In axial direction while, at the same time, holding and guiding the Insulators (7).</p> |
