Metal & Mining
| Wed 23 Sep 2026
Beijing, Sept. 22 -- State Intellectual Property Office of China has received China University of Mining patent application for Chain Type Automatic Drill Rod Supply Device and Method. He Zhengxiang, He Xinge, Zhang Mengmeng, Li Zenghui, Li Yupeng, Wei Runqin, Xue Biao, Zhong Deyun, Gao Qikai, Xu Xingliang, Hu Weichao, Guo Qingb..