Chemicals
| Mon 18 May 2026
Beijing, May 18 -- Henan Longyu Energy Co Ltd and China University of Mining have applied Chinese patent for Directional Acid Etching Weakening Method and Equipment for Coal Mine Working Face Corner. Jiang Heng, Li Bowen, Zhang Fei, Guo Yachao, Zhao Wei, Li Lifeng, Zhu Zhongpeng, Yao He, Cheng Xiaowei, Zhang Zhenhu, Cui Tianyu, ..