Defense
| Wed 18 Mar 2026
Beijing, March 18 -- Guangzhou Metro Design & Research Institute has submitted a patent application for Automatic Control Light Threshold-free Flood Gate. This invention was developed by Tao Tao, Zhang Wei, Zhao Junlong, Wang Yangming, Zhang Dejun, Xie Feng, Wang Dijun, Nong Xingzhong, Song Haohao, Fan Zechen, Xu Shixing, Wang S..