Oil & Gas
| Tue 26 May 2026
Beijing, May 26 -- PetroChina has submitted a patent application for Non-standard Flange Plate and Steel Ring Design Method, System, Equipment, Medium and Product. This invention was developed by Xu Zhixiong, Feng Shaobo, Zhao Mifeng, Wu Shengnan, Wang Chunsheng, Liu Hongtao, Wei Junhui, Xie Junfeng, Liu Tianhao, Xiong Maoxian, ..