| 摘要 |
<p>The tension and pressure-resistant scaffolding framework jack has one end non-rotatably connected to one joint piece and its other and telescopically protruding into a tube serving as the other joint piece, with supporting unit. A detachable clamping coupling (3) is incorporated, between nut (4) and tube (2). At least one of the coupling components fitted to the nut or tube may be rotatable relative to its carrier, about the jack axis.</p> |
