Pipe
| Mon 31 Aug 2026
Beijing, Aug. 31 -- CNOOC China Co Ltd Hainan Branch has been granted a patent for Inflatable Pipe Plug Capable of Being Filled with Water. Li Zhi, Li Ruijian, Sun Yinghong, Sun Zan, Zhu Yaheng, Zhang Haipeng, Feng Fuzhi, Wu Wei, Yang Xiaogui, Liao Hong, Xian Kaiyin, Lin Fei, Fu Fukang, Liu Longbin, Liu Wenshan and Hu Jing devel..