Security & Protection
| Wed 26 Nov 2025
Beijing, Nov. 26 -- Zhao Zilong has sought patent for Anti-freezing Hydraulic Safety Valve Device. This invention was developed by Zhao Zilong, Zhao Yixin, Zhang Meilin, Yang Jinsong, Sui Yong, Yu Hantao, Jiang Kequan, Li Zhuchen, Sun Jingnan and Wen Huizi.
The patent application number is CN202510124292 20250126. The patent ..