Security & Protection
| Mon 08 Dec 2025
Beijing, Dec. 8 -- China Gezhouba Group Machinery & Ship has secured a patent on Locking Device with Four Degrees of Freedom Based on Hydraulic System. Xu Yingmeng, Chen Yong, Xiang Aihua, Zhao Qinggong, Liu Guifang, Chen Hao, Gao Wei, Xu Shenggang, Niu Rongjian, Shi Jie, Mao Youliang, Xu Jian, Liu Jianhong, Li Yiqiang and Teng ..