Transportation
| Wed 01 Jul 2026
Beijing, July 1 -- China Railway 20 Bureau Group has submitted a patent application for Tunnel Blasting Excavation Method for Large Deformation Section of Soft Rock. Wang Xingli, Liu Wubo, Du Pengxiang, Xu Jianping, Zhang Shuai, Li Sheng, Yang Jie, Zhang Xubei, Wang Yin, Luo Shijun, Li Shuguang, Pan Ankang, Zhang Jihu, Lyu Pengt..