Tools and Machinery
| Fri 01 May 2026
Beijing, May 1 -- Guangdong Zhongnan Iron and Steel has submitted a patent application for Machining Method of Four-side Rib Disc Screw Roll Ring. This invention was developed by He Yiding, Li Shuhong, Yu Zhihong, Li Yuanwang, Yu You, Zhao Jianjiang, Cao Xianxiang, Pan Kangrong, Zhang Hao, Liu Haiwen, Liao Xinrong, Chen Yixu, Li..