Transportation
| Thu 16 Apr 2026
Beijing, April 16 -- China Railway Jinan Group Co Ltd Qingdao Train Depot has submitted a patent application for Retarder Assembly Stable in Operation. This invention was developed by Zhao Wendan, Zhang Xuezheng, Zhao Yunlong, Li Yicai, Li Shumin, Wang Xiaodong, Yu Haining, Zhang Linzhi, Li Chutao, Zhou Kejiao, Guo Jian and Zhen..