Transportation
| Tue 21 Jul 2026
Beijing, July 22 -- China Railway Seventh Group and Zhengzhou Engineering of China Railway Seventh Group have sought patent for 3D Printing Tunnel Integrated Lining Construction Method. This invention was developed by Wang Gaofeng, Wu Lizheng, Wang Supeng, Yang Haobo, Tao Yilong, Zhang Yalei, Li Xu, Zhang Jinchuan, Jiang Wei, Ch..