Enviornmental
| Thu 22 Jan 2026
Beijing, Jan. 22 -- Shanxi Road and Bridge Fourth Eng Co Ltd has filed a patent application for Tunnel Waterproof and Drainage Structure. This invention was developed by Xuan Baoxi, Li Zhuduan, Zhang Zhiyong, Guo Wei, Cao Yuan, Li Lingyun, Qu Hongxia, Wang Xiaojuan, Dang Huawei, Xu Dongye, Liu Haiqiang, Cui Jianqi, Qiao Lei, Qia..