| 摘要 |
In a rostrum (1), comprising a rostrum support structure comprising a plurality of frame units; the frame units comprising at least a first frame unit (20), a second frame unit (30) which is retractable in a retraction direction from an extended position into the first frame unit (20), and a third frame unit (40), which is retractable in the retraction direction from an extended position into the second frame unit (30) and a latching mechanism. |
