Fishing
| Thu 26 Mar 2026
Beijing, March 27 -- Xianning Fengyuan Electric Ind Co Ltd has submitted a patent application for Drilling and Fishing Integrated Drill Bit for Rock Stratum and Using Method. This invention was developed by Cao Fumin, Li Piao, Jiang Xiaowan, Zhang Hao, Tian Feng, Chen Ronghua, Gan Quan, Wu Gang, Liu Yinchen, Chen Qiang and Zhang..