Transportation
| Fri 07 Aug 2026
Beijing, Aug. 7 -- China Railway Seventh Group and Zhengzhou Engineering of China Railway Seventh Group have sought patent for Tunnel Intelligent 3D Printing Trolley. This invention was developed by Shi Junwei, Wang Gaofeng, Wu Lizheng, Wang Supeng, Zhang Guoyue, Yang Haobo, Tao Yilong, Zhang Yalei, Zhang Jinyang, Li Xu, Zhang J..