| 摘要 |
<p>A concrete or like articulated mattress for protection of seabed installations comprises a plurality of concrete elements (31, 32, 33, 34, 35) articulated together, the mattress having a relatively thick region (33) from which its thickness tapers to at least one side edge (36, 37). In the thick region (33) a tunnel (60) can be provided to accommodate a seabed installation such as a pipeline to be protected.</p> |
