Transportation
| Sat 27 Jun 2026
Beijing, June 27 -- China Railway No 9 Engineering Group has filed a patent application for Pipe Network Rapid Butt Joint Sealing Device. This invention was developed by Wang Kaixin, Wang Junhou, Wang Fenjun, Lu Xiaofan, Wang Runsheng, Shi Chao, Wang Miaoxin, Liu Xuan, Pan Tingwei, Zhang Zhongyue, Wang Xiaoqiang, Han Zedong, Su ..