Construction
| Fri 17 Jul 2026
Beijing, July 17 -- Feng Youyang has applied Chinese patent for Duct Back Backfilling and Tamping Equipment for Highway Bridge. Zhang Hongfeng, Wang Yan, Gao Mengyao, Shi Yan, Feng Youyang, Ning Jianyang, Qian Jingpan, Zhang Shuo, Zhu Bo, Wu Chen, Zhang Chong, Zhao Tianyang and Gao Wei developed it.
The patent application num..