| 摘要 |
<p>A paver comprising a first side having a length L1 and a groove disposed along the length L1 of the first side. A second side having a length L2 and a tongue disposed along the length L2 of the second side. A third side opposite the fist side and having a tongue with length L3 disposed along the first side, where the length L3 is less than the length L1. A fourth side having a substantially flat surface with a length L4, where the length L4 is equal to L1 minus L3.</p> |
