Engineering
| Wed 22 Apr 2026
Beijing, April 23 -- Guangzhou Metro Group has filed a patent application for Handrail Pull Ring Repairing Device. This invention was developed by Xu Rongsheng, Deng Dongqiang, Wu Guowen, Su Zhicai, Sun Haiqiang, Shen Jinhuan, Jeon Jun Kyu, Ma Donghui, Zhang Liang, Deng Qichu, Chen Zhiyuan, Liang Xuewen, Huang Zhouxing, Chen Sha..