Metal & Mining
| Tue 10 Nov 2026
Beijing, Nov. 10 -- Donghuantuo Mining Branch Kailuan Group has obtained a patent for mine track calibrator. This invention was developed by Hao Zhihong, Liu Hongbo, Cai Dongxue, Cui He, Zhang Lihong, Chen Chunlai, Bai Qinghui, Sun Wei, Wu Yongbin, Geng Zhixin, Liu Tieyong, Yan Zhonghui, Han Meng, Li Ran, Liu Zhaodong and Ding X..