Construction
| Fri 09 Oct 2026
Beijing, Oct. 9 -- Sinohydro Bureau 14 has obtained a patent for air circulation device for tunnel civil engineering. This invention was developed by Yang Yagang, Cai Ankang, Miao Maihe, Li Zhongkang, Li Jun, Zhao Dawei, Liao Fanlin, Li Wenhai, Li Li, Yang Nongping, Sun Ru, Chen Shanjiang, Yin Kai and Qi Huizhen.
The patent app..