Transportation
| Tue 02 Dec 2025
Beijing, Dec. 2 -- China Railway No. 9 Engineering Group has sought patent for Wall Surface Crack Treatment Device for Building Construction. This invention was developed by Wang Junhou, Liu Baozuo, Sun Tianzuo, Zheng Zhi, Zhang Yirui, Li Fei, Shi Chao, Lyu Han, Wang Shijiao, Su Guangning, Li Shihai, Ma Yong, Yu Jiabin, Wang Qua..