Security & Protection
| Tue 17 Mar 2026
Alexandria, March 17 -- Zhalainur Coal Industry LLC has filed a patent application for Early Warning and Emergency Device for Sudden Stress Change in Surrounding Rock and Method of Use. This invention was developed by Zhang Jinliang, Li Qinghai, Yan Shouqing, Ma Luchao, Li Lin, Li Zhe, Zhou Peijun, Wang Guohui, Zhao Yu, Hou Lei,..