| 摘要 |
The invention relates to a metal roof plate for cleaning and maintaining the clean state of building roofs, in particular from plant growth of environmental pollution. The object of the invention is to improve the efficiency of said metal roof plate comprising a metal reacting in conjunction with moisture, said plate being produced by punching from material in the shape of a plate, and having textured reaction surface (2) with raised lumps (3) and openings (4). The object is attained in that the openings (4) of the lumps (3) are inclined in the opposite direction to the direction (A) of water discharge.
|
