| 摘要 |
<p>The invention relates to improved structural blocks particularly useful for retaining wall systems, cribbing and other similar structures wherein the upper or superior courses of the blocks are arranged in interlocking relation with the inferior courses and establish a selected uniform inclination from the lowermost course to the uppermost course achieved by providing projections that upstand from the top walls of the inferior blocks in a uniformly offset relation to the front facings and matching recesses included in the bottom walls, of the superior blocks.</p> |
