Transportation
| Wed 15 Jul 2026
Beijing, July 16 -- China Railway 20 Bureau Group has submitted a patent application for Method, Device, Equipment and System for Evaluating Looseness of Tunnel Waterproof Plate and Medium. Wang Xingli, Liu Wubo, Du Pengxiang, Xu Jianping, Zhang Shuai, Li Sheng, Yang Jie, Wang Yin, Li Shuguang, Fan Shengyuan, Wang Qingsong, Pan ..