| 摘要 |
The invention relates to a panel which can be used as part of a building wall and which is provided with a structure, i.e. with elevations and/or recesses, on one side facing a layer to be applied. This structure has undercut recesses (2, 12, 22, 32), i.e. recesses which have at least one boundary surface (2.1, 12.1) the normal vector (2.2) extending from the material has a normal component (2.2.1) in relation to the surface (1.1, 11.1) in which the recess is made, said normal component being directed from said surface (1.1, 11.1) towards the panel (1, 1) and not away from it. |
