Security & Protection
| Sun 01 Nov 2026
Beijing, Oct. 31 -- Yunnan Chihong Zinc & Germanium has obtained a patent for hydraulic device for safety maintenance of trackless equipment. This invention was developed by Zeng Yu, Zhang Jun, Gao Guanyong, Wang Duoyan, Xu Zhenghui, Xu Bo, Kong Xiangwen, Hu Zhongyu, Fan Peng, Wang Shihua, Lai Hongbang, Chen Bangwan, Zhuang Weix..