| 摘要 |
<p>The cleaning system for a surface exposed to weather has reaction surfaces arranged in layers (1.1-1.3). It has metallic surfaces and preferably with a copper content which, in combination with water, develop fungicidal and/or bactericidal compounds which dissolve in water, and which act in cleaning the exposed surfaces. At least two layers are held apart by spacers (2), at least in a part-area, to form zones (14) between them to build up moisture and where rain water can flow in and flush them out. The outer layer has a number of openings (6).</p> |
