韓日海峡受け継ぐ海上大橋建設方法捜した
<iframe width="1280" height="640" src="https://www.youtube.com/embed/BNzmmYPhLtg" title="手元構造物 | エンジニアはどんなにこれを作りましょうか?" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
<iframe width="1280" height="720" src="https://www.youtube.com/embed/DvIdxtUe9Ho" title="【明治用水頭首工】堰柱解" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>