| 摘要 |
<p>The tile has an outer head grooving rib passing from a side interlocking joint to a cover grooving part (3) and a plateau (2113) present upstream to a width of the grooving part and a length of a head interlocking joint. The plateau is delimited opposite to the edge section with an L-shaped elongation rib of an outer head notch rib. The plateau is flanked by an edge rib, which is passed into an extension rib (2112) and arranged in an outer cover grooving edge (311) of the grooving part. An S-shaped rib (2114) runs over the plateau to an inner head grooving rib based on the edge rib.</p> |
