Security & Protection
| Thu 01 Oct 2026
Beijing, Sept. 30 -- Henan Mechanical & Electrical Vocational College has sought patent for Folding Emergency Fire-fighting Escape Ladder for Building Construction. This invention was developed by Zhao Qingzhan, Liu Jianing, Wei Qingchao, Rao Xiaohui, Wang Shilin, Chen Jian, Zhou Li, Li Weiting, Wang Dongxia, Wang Xiaokan, Wang ..