Industrial
| Sat 29 Aug 2026
Beijing, Aug. 29 -- Qiqihar Heping Heavy Industry Group has secured a patent on High-precision Inner Hole Grinding and Polishing Device. Jin Yong, Ren Tianyi, Song Zongrong, Lyu Dong, Yan Xiaoling, Nie Zhenyu, Liu Bingxin, Liu Lu, Sun Libo, Xia Hongbin, Xu Shoufeng, Liu Jianzhong and Zhao Xudong developed the invention.
The p..