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| Fri 02 Oct 2026
Beijing, Oct. 2 -- State Intellectual Property Office of China has awarded a patent to CCCC Tunnel Engineering Company for Anti-retraction Hoop Device. Zhang Zhiyu, Lyu Zhijia, Zhang Xiao, Zhang Xiying, Guo Yi, Qiao Shaoqiang, Liu Yang, Lei Xing and Liang Ji developed the invention.
The patent application number is CN2025203044..