Transportation
| Tue 05 May 2026
Beijing, May 5 -- China Railway Shanhaiguan Bridge Group has submitted a patent application for Drilling Process for Large-diameter Hole. Han Weihao, Zhang Wei, Liu Mengtao, Gao Zhijun, Liu Xuesong, Huang Chuanyue, Si Yongnan, Liu Yang, Li Shuyuan and Ma Jiaxin developed the invention.
The patent application number is CN2025117..