| 摘要 |
<p>According to the invention, there is provided a telescopic device 20 comprising a first tubular element 1 and an extension member 2, where the extension member 2 is displaceably arranged in an axial direction within the first tubular element 1 and wherein a coupling member 3 is provided movably on the extension member 2 and is positionable in first, second and third axial positions.</p> |
