Oil & Gas
| Tue 11 Mar 2025
Beijing, March 11 -- CRRC Qiqihar Rolling Stock and Petrochina Co Ltd have obtained a patent for unloading device. This invention was developed by Wang Chenglong, Yang Xuebai, Chen Lanzhong, Cao Bingwu, Zhu Wanhai, Li Hua, Liu Haipeng, Yue Linghan, Yang Qipeng, Li Tao, Gong Wenxin, Hou Tianhua, Li Cui, Zhang Junfeng, Yin Jing an..