Measurement & Testing
| Fri 31 Jul 2026
Beijing, July 31 -- Changqing Eng Design Co Ltd and China National Petroleum have applied Chinese patent for Device for Collecting Soil Sample in Exploratory Well and Working Method of Device. Zhang Xi, Hou Dayong, Luo Wen, Fang Yahong, Zhu Guocheng, Li Xiaofei, Li Yanfang, Liu Jing, Wu Jun, He Jun, Luo Jianwen, Zeng Farong, Zha..