Transportation
| Wed 02 Sep 2026
Beijing, Sept. 2 -- China Railway Major Bridge Engineering Group and The 7th Eng Co Ltd Mbec have submitted a patent application for Tunnel Underground Excavation Construction Method. Liu Yafei, Li Zixue, Hu Jianxun, Li Zhenhua, Zhang Xiang, Zheng Jun, Ma Haohao, Zhang Linyan, Cai Junjie, Tao Zhenglin, Zhang Youguang, Liu Yu, Wu..