Sports
| Sat 07 Feb 2026
Beijing, Feb. 7 -- Jinxi Industries Group has been awarded a patent for Steel Ball Double-sided Grinding and Polishing Positioning Device for Hardness Detection. This invention was developed by Chen Yannan, Zhang Xiaoli, Chen Chen, Yang Dongxing, Ma Cheng, Yang Jing, Liu Zhen, Wu Zijie, Gan Feng, Pang Ruiqiang, Cheng Xinlei, Sun..