Metal & Mining
| Thu 19 Mar 2026
Beijing, March 19 -- Henan Jiao Mei Energy Co Ltd has applied Chinese patent for Intelligent Access Control System for Coal Mine. Ma Yancao, Yang Bin, Wang Fei, Li Guodong, Zhao Lekai, Jin Yudong, Hu Guanglin, Qiao Xiaokang, Xia Liuyun, Zhao Zhiyuan, Liu Pengfei, Ma Qunli, Lou Songlei, Huang Jianwei, Dong She, Zhu Fuwen, Huang W..