Improvements in or relating to artificial blocks for the protection of structures exposed to the action of moving water

摘要

683,360. Subaqueous buildings. ETABLISSEMENTS NEYRPIC. Feb. 12, 1951 [March 10, 1950; Feb. 2, 1951], No. 3424/51. Class 68(ii) Breakwaters, jetties &c. are built up from loosely interfittirig blocks 7 each of which has at least four projections 1 whose axes radiate substantially from a common central zone and which are separated by recessed portions. Several forms of blocks are described.