Tools and Machinery
| Fri 07 Aug 2026
Beijing, Aug. 7 -- CNPC Greatwall Drilling and China National Petroleum have sought patent for Sizing Milling Tool and Milling Method Thereof. This invention was developed by Li Hu, Zhang Wenmin, Chen Deng, Hao Jingxuan, Du Lei, Bai Weiqiang, Li Xuefeng, Huo Xin, Bu Wenyang, Gao Qingchun, Huang Shuai, Feng Xiaoqiang, Huo Aili, X..