Security & Protection
| Tue 02 Dec 2025
Beijing, Dec. 3 -- Shandong Longjia Safety Equipment Co Ltd has submitted a patent application for Composite Material for Manufacturing Bulletproof Helmet and Preparation Method Thereof. Chen Junhua, Liu Xia, Chen Chuanzhen, Chen Yucheng, Wang Xiaochen, Cheng Hui, Tian Xingang, Yin Xunwen, Feng Yun and Meng Xue developed the inv..