Oil & Gas
| Fri 12 Dec 2025
Beijing, Dec. 12 -- Changqing Eng Design Co Ltd and China National Petroleum have filed a patent application for Pipeline High-consequence Area Grade Identification Method. This invention was developed by Jin Jiwei, He Jun, Li Xiaofei, Li Xiangting, Wang Zhijun, Hou Dayong, Jia Peng, Wen Xiaoyong, Wu Jun, Luo Dongshan, Wang Yan,..