GENEVA, March 8 -- CCCC FIRST HIGHWAY XIAMEN ENGINEERING CO., LTD. (No. 139 Yinjiang Road, Jimei DistrictXiamen, Fujian 361000), 中交一公局厦门工程有限公司 (中国福建省厦门市集美区银江路139号) filed a patent application (PCT/CN2023/139444) for "CONSTRUCTION METHOD FOR KARST TUNNEL TO EXTEND THROUGH KARST CAVE" on Dec 18, 2023. With publication no. WO/2025/043970, the details related to the patent application was published on Mar 06, 2025.
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed by the World Int...