Metal & Mining
| Wed 29 Apr 2026
Beijing, April 29 -- Duan Tong has submitted a patent application for Coal Mine Collecting Device in Coal Mining. Yu Zhanjun, Wang Guoshuai, Li Wenjun, Xiong Tingli, Liu Zhigang, Fang Renyi, Zheng Nan, Zhuo Pingshan, Duan Tong, Zhang Bo, Xing Guidong, Tong Dajiang, Zhang Yinchao, Fu Bowen, Xia Zhifeng, Zuo Bao and Yu Junping dev..