国家地理 伟大工程巡礼 深海高速 下载

NG Megastructures - Deep Sea Highway<br>国家地理 伟大工程巡礼 深海高速<br><br>Deep Sea Highway A look at the most deeply submerged road on the planet, which runs through a tunnel that is both earthquake and typhoon-proof.The deepest immersed tunnel to be built in open waters along with two cable-stayed bridges have opened to traffic in South Korea. The tunnel represents a major leap forward in immersed tunnel technology.<br><br><br>