| 摘要 |
The wall board device (10) has an adjustable-height wall board (15), held on a frame (11) fixed to the wall. A power support (20) to raise the board and slow it down during lowering has at least one compressed gas spring (22, 24) aligned along the setting direction of the board and with one end (21) fixed to the board and the other (24') to the frame.
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