| 摘要 |
The invention relates to a structure for protecting sea and/or river construction work, which uses blocks (1) including a central core (2) having an upper portion (4) and a lower portion (3). The central core (2) is surrounded, in the lower portion thereof (3), by a circular projection (5) including side surfaces (9) and is capable of abutting, by means of at least one of the side surfaces (9), at least one of the side surfaces of a circular projection of an adjacent block. |
