Construction
| Mon 18 May 2026
Beijing, May 18 -- State Grid Beijing Electric Power Co and State Grid Corporation of China have submitted a patent application for Rack Base Device for Double-rocker-arm Floor Derrick. Wang Hao, Zhang Maoqun, Nie Jieliang, Li Xiqin, Liu Jiantao, Zhang Qi, Liu Jiabin, Jiang Shuai, Shen Tong, Song Minghui, Zhao Shuo, Wang Bin and..