| 摘要 |
the slab has first grooves (14.1-14.n) in the first main side, in which first lines (83.1-83.n) are laid; and in the second (opposite) main side, second grooves (15.1-15.n), in which second lines (93.1-93.n) are laid. The finishing coating has a first reinforced mortar layer (12, 13) on the first main side of the slab and a second one (16, 17) on the other main side. The first and second lines are at least partly connected to each other. |
