| 摘要 |
Display devices for, e.g., advertising purposes, are provided wherein at least one member slides relative to at least one other member to a "reveal" position so as to display new and different information. In one embodiment, two sheath members move relative to a slide member while in another, two slide members move relative to a sheath member. In another embodiment, cutouts or windows are provided which reveal different information in different positions of the movable member or members of the device.
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