| 摘要 |
1. Stand having a column (2) and an extension arm (3), which is connected to said column and can be swivelled about an axis, and a gas pressure spring (14) for mass balancing, in which the extension arm (3) can be locked in relation to the column (2), characterized in that a positive lock (19, 20, 21) is provided which can only be effected in that position in which the gas pressure spring (14) is in an at least almost extended, unstressed position. |
