Security & Protection
| Wed 11 Dec 2024
Beijing, Dec. 12 -- Guangzhou Di Er Construction & Eng has obtained a patent for assembly type safety ladder cage base. This invention was developed by Yao Lei, Yu Weijian, Wang Weijiang, Cao Suidong, Ye Dike, Chen Yujun, Nie Xiujuan, Zhong Yingsi, Chen Feilong, Wang Juelong, Zhu Yuquan and Chen Yuwen.
The patent application ..