防波石 meaning in Chinese

dolos block
dolosse

Sediment and soil were removed to expose the bedrock and enable the dams to be erected on solid rock . the cofferdams were retained , and the seaward one served as a protective structure . the seawardside of the cofferdam for the east dam was placed with more than 7 , 000 dolosses , each weighting 25 tonnes to stop the pounding ocean waves
堤坝建成后，围堰仍然保留，用作主坝的护堤，西坝的护堤，向海的一面更安放了七千多块每块各重25吨的防波石，阻挡来自南中国海及太平洋海浪的冲击。