Chemicals
| Sun 02 Aug 2026
Beijing, Aug. 3 -- CHN Energy Group Ningxia Coal Industry has been granted a patent for Polyformaldehyde Granule Processing System. This invention was developed by Ren Xiaodong, Ma Shengcheng, Zhang Yajun, Cao Haijin, Gao Yong, Wang Liang, Wang Yongsheng, Hong Gil-jun, Fan Minghao, Zhang Yan, Chen Haihua, Ma Haibo, Li Lianyou, X..