Petrochemicals
| Sun 18 Jan 2026
Beijing, Jan. 19 -- State Intellectual Property Office of China has awarded a patent to Luoyang Ruichang Environmental Engineering for External Air Preheater for Multi-stage Tube Bundle Parallel Tube Box. Li Huanli, Li Yanwei, Guo Yeyuan, Zhang Li, Yao Zongyuan, Li Shaojie, Jin Xuli, Wang Wenqi, Xiang Ying and Guo Zheng develope..