| 摘要 |
A device for displaying information in identification areas of traffic signs, signposts, billboards, license plates, etc. The identification area is provided with a surface having an artificially producible base structure and other structures or itself forms such a surface having a self-cleaning effect. The base structure has or develops a capillary effect in which the quotient of capillary work and adhesion work is greater than 1. The capillaries have a negative rise, that is, liquid is pressed form the capillaries, providing the self-cleaning effect.
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