Defense
| Tue 16 Jun 2026
Beijing, June 16 -- Guangzhou Juan Defense Engineering has submitted a patent application for Civil Air Defense Door of Composite Structure and Installation Method of Civil Air Defense Door. This invention was developed by Wang Jialin, Chen Zhiliang, Chen Zhiyuan, Huang Shaoqiang, Huang Jiajian, Liu Weicai, Xie Danfeng, Yang Yu,..