Construction
| Wed 26 Aug 2026
Beijing, Aug. 26 -- Beijing Urban Construction Group has been granted a patent for Mounting Structure of Spiral Staircase. Yue Tongkun, Lu Min, Zhang Zhikai, Ning Xin, Mei Xiushan, Song Changwei, Wang Haoyu, Zheng Shuai, Han Minjian, Chen Wentao, Chen Siping, Xia Weibin, Sun Ming and Guo Zhipeng developed the invention.
The p..