| 摘要 |
<p>The upper longitudinal edges of the vertical strips (7, 8) extend into the plane running in the upper side (16) of the breakthroughs (14, 15) extending into the mortar bed (3) on their upper longitudinal edges are joined to one another by a bridge part (11) formed in its surface as a closed rib. The breakthroughs (14) in the upper longitudinal strips of the vertical strips (7, 8) extending in the height area of the coating (1) have smaller cross-sections than those (15) in the lower strips (13) located in the height area of the mortar bed (3).</p> |
