Enviornmental
| Tue 02 Dec 2025
Beijing, Dec. 3 -- State Intellectual Property Office of China has awarded a patent to Changjiang Ecology Environmental Protection Group for Filter Structure of Sand Filter for Sewage Treatment. Guo Keqian, Yan Yingying, Li Qiang, Sun Zhen, Li Xingwang, Wang Di, Hsieh Jeff Yeu-farn, Chen Desong, Bai Bin, Zhao Yusheng, Yu Lei and..