Tools and Machinery
| Sun 18 Jan 2026
Beijing, Jan. 19 -- Huaibei Mining has applied Chinese patent for Plugging Device Suitable for Inclined Drill Hole. Fang Liangcai, Sun Fang, Nie Zheng, Zhu Lezhang, Yang Jingxuan, Gao Dengyou, Cheng Hao, Liu Shoufu, Huang Beihai, Yang Wenyu, Liu Wei, Gao Hongliang, Zhu Xingzhou and Wang Dianguo developed it.
The patent applic..