Improvements in or relating to protective structures exposed to the action of moving water

摘要

676,082. Dykes. ETABLISSEMENTS NEYRPIC. Feb. 12, 1951. [Feb. 24, 1950] No. 3423/51. Drawings to Specification. Class 68 (ii). A dyke system comprises a main obstacle and a lower subsidiary obstacle spaced from the main obstacle on the sea side so that waves break over the subsidiary obstacle and crash in the basin between the two obstacles.