Transportation
| Sat 13 Jun 2026
Beijing, June 13 -- China Railway 20 Bureau Group has sought patent for Tunnel Micro-step Construction Method for Large-deformation Section of Soft Rock. This invention was developed by Lyu Pengtao, Wang Yin, Xu Jianping, Li Shuguang, Wang Xingli, Zhao Xiaofei, Wang Yi, Pei Qiuyang, Li Sheng, Du Pengxiang, Qu Yakang, Zhang Shuai..