Transportation
| Thu 03 Jul 2025
Beijing, July 3 -- State Intellectual Property Office of China has awarded a patent to China Railway Eng Services Co Ltd for tbm main drive center hole plugging device. Yang Shihao, Zhuang Yuanshun, Liu Guangxin, Zheng Jun, Luo Hongmei, Deng Yang, Mei Yuanyuan, Gao Xudong, Ma Zhou, Zhang Yang, Wang Yuchen, Li Jie, Su Yuanjie and..