| 摘要 |
592533 A whiteboard (10) is disclosed comprising a transparent panel (12) locatable in front of a surface (20). The whiteboard has a screening means comprising a blind (14) windable onto a reel (30). In a first state the blind is wound onto the reel and in a second state the blind is extended from the reel to be adjacent the transparent panel (12) to obscure view through the transparent panel (12) to the surface (20).
|
