Security & Protection
| Fri 26 Jul 2024
Beijing, July 26 -- PetroChina Co Ltd has secured a patent on high-hole valve and high-hole valve slide valve safety device. Zhang Xiongwei, Zhang Yibing, Zhang Yibo, Li Qiang, Feng Chao, Tang Jiayang, He Yang, Huang Taihong, He Jingran and Zhao Wenxiu developed the invention.
The patent application number is CN202321544032U ..