| 摘要 |
<p>The device has frames (19), which are arranged in horizontal. The frames accommodate an active board (17) and a video projector (18), which is aligned to the board. The frames have adjustable swiveling arms (20), which permit the adjustment of the frames along with the board, which is perpendicular to the frames, between upper position and lower reading positions. The arm has a powered drive. The arms are arranged such that a path with a horizontal component is provided for the board.</p> |
