| 摘要 |
<p>The present invention relates to elements of a technical area floor, raised up in relation to the load-bearing ground. According to the invention, the jack comprises a base-plate (1), a threaded rod (3) firmly secured to the base-plate, an adjustment nut (4) mounted on the threaded rod, a support head (5) mounted freely and coaxially in relation to the rod (3), resting on the nut (4), and comprising a bearing surface (5a) substantially parallel to the load-bearing ground (2). <IMAGE></p> |
