Metal & Mining
| Thu 24 Sep 2026
Beijing, Sept. 24 -- Chinese Patent for Coal-rock Mass Pre-stressed Bolt Injection and Filling Supporting Structure has been issued to Henan Yingchuang Mine Eng Co Ltd. This invention was developed by Wan Shuguang, Zhao Xiaoyu, Xiong Huxin, Geng Haitao, Yin Congshuai, Sun Hao, Shi Zhijie, Li Bin, Yi Yongjie, Zheng Mengxiang, Yua..