Transportation
| Sat 06 Jun 2026
Beijing, June 6 -- China MCC17 Group has submitted a patent application for Adjustable Grid Steel Frame Tunnel Surrounding Rock Support Linkage Device and Distance Adjusting Method. Huang Jinkun, Wang Lei, Cheng Anchun, Wang Tao, Kim In-jae, Zhao Guohui, Bai Lijia, Zhu Yan, Zhang Shilei, Zhang Jiangong, Chen Chao, Hu Yi, Jiang P..