Steel
| Sat 15 Aug 2026
Beijing, Aug. 15 -- Offshore Oil Engineering and China Nat Offshore Oil Corp have submitted a patent application for H-shaped Steel Web Grinding Device and Method. This invention was developed by Chen Li, Du Zhaoxia, Liu Bo, Nie Chuan, Jia Xueqing, Liu Ruifeng, Geng Xiaomin, Zhang Kai, Jiang Ruijing, Li Changlong, Wang Yongzhao,..