China Railway Tunnel Group CRTG
https://www.prnewswire.com/news-releases/intelligent-systems-employed-in-constructing-chinas-deepest-undersea-tunnel-302127657.html
from KraussMaffei' press information https://press.kraussmaffei.com/en/news/from-the-sea-into-the-tunnel-kraussmaffei-customer-oldroyd-uses-100-sea-plastics-for-its-products