Construction
| Fri 07 Aug 2026
Beijing, Aug. 7 -- Ranken Railway Construction Group has submitted a patent application for Subway Section Air Duct Combined Construction Method. This invention was developed by Zhao Kai, Shen Xiaobing, Zhang Hong, Ye Tao, Liu Qin, Lai Caiwen, Xu Yang, Shi Hongyi, Zhang Jingwei, Li Hengli and Hou Xiaoyi.
The patent application ..