Steel
| Sat 25 Jul 2026
Beijing, July 25 -- Henan Defang Heavy Equipment has sought patent for Steel Box Girder Flange Plate Welding Trolley and Method. This invention was developed by Liu Jiawu, Tao Xiaoxiao, Liu Jie, Du Sansen, Yang Hao, Xue Jianli, Yao Zhihua, Yang Zunjia, Zhang Shaoping and Li Mengjun.
The patent application number is CN2026103010..