| 摘要 |
<p>A support component (1) with a lower support part (3) is placed on a line regulatable as to height (5) and tensioned between two measurement points. A long pointer (6) works in conjunction with a triangular reference unit (7) which is provided with position markings (13) on a scale portion (12). The pointer (6) and reference unit (7) at least partly are located below the line (5), with the pointer firmly connected to the support component (1), whilst the reference unit is located pendulously in the line longitudinal direction around an axis (9) fitted in the support component (1) and has such a wt. distribution that the appts. does not tip over in the line transversal direction. This is also prevented by the lower support part (3) having a length which is adjusted in the line longitudinal direction.</p> |
