| 摘要 |
The covering has a lower-side protrusion (9) which extends above the bottom surface (4) of the concrete block (1). A lateral projection (10) extends above the lateral surface (5) of the concrete block. The number of the lateral projections (11) of the concrete block is extended into the lateral recesses (13) of another concrete block. The lateral surface of the concrete block extends as the lateral recess (12) behind the lateral surface (7). The lateral surface (6) of the concrete block extends as side recess beyond the side surface (8). An independent claim is included for method for manufacturing floor covering. |
