| 摘要 |
<p>The reinforcement comprises two layers of netting A1 and A2 formed by lengthwise oriented parallel wires (12a, 12b, . . . 13a, 13b, . . . ) and by crosswise oriented wires 8a, 8b, . . . 9a, 9b, . . . 10a, 10b, . . . 11a, 11b, . . . ); the meshes they form are square or rectangular in shape. Lengths of spacing wire (1, 2, 3) having the shape of zig-zags are connected obliquely to the two layers of netting. The spacing wires (1, 2, 3) are welded to the lengthwise oriented wires (12b, 12c, . . . 13b, 13c . . . ) and to the crosswise oriented wires (8a, 8b . . . 10a, 10b, . . . ) at their crossings.</p> |
