Lighting
| Sun 21 Dec 2025
Beijing, Dec. 22 -- Liaoning Light Industry Design Inst Co Ltd has sought patent for System and Method for Preparing High-purity Hydrogen Sulfide Gas. This invention was developed by Meng Qingxu, Kang Yang, Geng Zhi, Li Yu, Ma Pingping, Wang Yan, Yang Heran, Chen Jia'ao, Tian Zhiwen, Li Junjun, Shi Jianhua, Cai Xinyu, Wang Jiang..