Engineering
| Mon 28 Oct 2024
Beijing, Oct. 29 -- China Coal Geology Group has been granted a patent for return rock core board fixer. Lai Qiang, Guo Yanyou, Yan Zhansheng, Dong Bin, Gao Shaofeng, Du Sunyan, Ma Guoqiang, Sun Nuoya, Kang Jiantong and Li Bing developed the invention.
The patent application number is CN202320562528U 20230321. The patent publ..