Construction
| Tue 16 Jun 2026
Beijing, June 16 -- Chongqing University, Chongqing Kean Mingyuan Tech Co Ltd and China Construction Fifth Engineering Division have sought patent for Expressway Gas Tunnel Ventilation Device. This invention was developed by Cheng Guang, Chen Yang, Zhu Jun, Zeng Penggang, Wang Yuanquan, Dong Hongkai, Jin Xiaoguang, Wang Zhen, Ya..