Rubber
| Sun 02 Aug 2026
Beijing, Aug. 3 -- China Oilfield Services has filed a patent application for Rubber Sealing Ring Mounting Tool. This invention was developed by Yu Hai, Mei Shaoliang, Huo Aiming, Sun Ping, Song Bin, Yuan Guilong, Yan Changfei, Wang Liang, Sun Hehui and Liu Zifa.
The patent application number is CN202610403529 20260330. The pat..