Security & Protection
| Tue 27 Oct 2026
Beijing, Oct. 26 -- Chinese Patent for Quick Opening and Closing Type Safety Valve has been issued to Kaifeng Ruifa High & Middle Pressure Valve Co Ltd. This invention was developed by Li Hongchao, Wang Ben, Sun Jianwei, Li Qiuxia, Zhang Yuanhang, Zhu Xuelong, An Junwei, Zhu Eran, Fu Liangfeng and Wang Yanlei.
The patent appl..