Transportation
| Mon 18 May 2026
Beijing, May 18 -- China Railway Tunnel Group has sought patent for Steel Arch Supporting Device and Method Thereof. This invention was developed by Li Zhijun, Zhai Qianzhi, Zhou Song, Gao Pan, An Bo, Wang Yue, Sun Feixiang, Wang Zhenlong, Dou Xiaotian, Feng Cunzhi, Wang Yanbo, Jin Wenjie, Sun Xianghui, Zhu Anmin, Yang Zhi, Deng..