| 摘要 |
<p>A walling block, made preferably of concrete, has a single registration stud (8, 9) positioned symmetrically on the top surface to engage slots (11, 12) on the underside of similar blocks to stabilize stacking. The registration studs are symmetrical, e.g. half spherical and are positioned symmetrically to the center line through the block, with the block size varied in set sub dimensions. The stud and groove system allows the blocks to be laid in a curving pattern without loosing stability.</p> |
