Steel
| Mon 27 Apr 2026
Beijing, April 27 -- Offshore Oil Eng Qingdao Co has applied Chinese patent for Round-square Transition Steel Plate Component Machining Die and Method. Li Hu, Liu Junfei, Cheng Jinyi, Song Lufeng, Jiang Xinliang, Yin Baorui, Yang Fengyan, Wan Xiulin, Liu Wen, Sun Yunliang, Yan Qingbo, Yang Hemin and Liu Jie developed it.
The ..