Tools and Machinery
| Wed 08 Jul 2026
Beijing, July 8 -- CNOOC Energy Development Equipment Technology has applied Chinese patent for Multi-pipe-diameter Air Shield Type Underwater Local Drainage Dry Type Welding System. Chang Wenpeng, Han Yu, Wang Yong, Yang Xitong, Feng Jia, Li Jinshan, Ren Lizhu, Liu Yajun, Gao Hongze, Zhu Junjun, Wang Chao and Wang Haijing devel..