Metal & Mining
| Tue 10 Nov 2026
Beijing, Nov. 9 -- Sichuan Hedi Mining Dev Co Ltd has been awarded a patent for Filtering Device for Surface Mine Ditch. This invention was developed by Tan Hongqi, Ni Xiancheng, Gong Qiang, Liu Jie, Ge Cheng, Xie Zhiyuan, Yang Wei, Liu Shangrong and Zhu Yingjiang.
The patent application number is CN202520218754U 20250212. Th..