Metal & Mining
| Tue 23 Dec 2025
Beijing, Dec. 23 -- Luoyang Yian Mining Industry has submitted a patent application for Fracture Plugging Device for Overlying Strata Separation Layer Grouting. Kong Lingjie, Shen Chuanbo, Yu Qingzhen, Zhang Hui, Guo Xianlin, Guo Yanjie, Han Xiaodong, Kang Chen, Li Ruixia, Liu Kuangwei, Huo Binbin, Li Xinbo, Ren Weibing, Zhang J..