Tools and Machinery
| Tue 26 May 2026
Beijing, May 26 -- Kunming Power Supply Bureau Yunnan Power Grid has applied Chinese patent for Light Landing Double-rocker-arm Derrick. Wang Minghua, Gan Long, Li Chan, Qin Jinping, Yuan Jie, Yang Biao, Sun Sihang, Zhao Shuzhe, Ma Chengpeng, Fu Jiahai, Zhao Rongpu, Cao Chunming, Xia Siyu, Shen Yanwei and Hu Yongxia developed it..