Security & Protection
| Fri 10 Apr 2026
Beijing, April 10 -- Hebei Construction Group has been granted a patent for Roof Protective Layer Dividing Joint Device. Li Longjie, An Weifeng, Guo Qunlu, Jia Fengsuo, Yao Xiaolei, Zhai Dongze, Li Shiqiang, Liu Hongbin, Yu Guoqing, Xie Hanwen, Xian Jintao, Zhen Lei, Li Junxia and Li Guanjun developed the invention.
The patent ..