| 摘要 |
<p>Multi-purpose cantilever riser unit for pavement construction and landscaping is made from concrete with or without metal reinforcement and comprises two flat sections at different heights, joined by an inclined section making a sharp angle with the top surface of the higher part and the undersurface of the lower part, merging in a curve between the other surfaces. The material may be concrete, lightweight aggregate concrete, terrazzo, polyester or PMMA bonded aggregate, and full and half-size units and corner pieces can be used to produce steps, stands, terracing, water cascades, retaining walls or radial designs.</p> |
