| 摘要 |
<p>The changeable publicity panel has an enclosure. In this are slideways, protected by a transparent face. Rods support the publicity material. The messages are on film which can be placed on or removed from the cords as desired. The assembly has internal lighting for night publicity. The film can be reflecting and held at the top and the assembly is movable. The writing, symbols and colours used comply with road sign standards. Electrostatic or magnetic forces can be used to fix the film to the cord.</p> |
