GENEVA, April 4 -- ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID (3/F Of Building J3 And 3/F, 4/F, 5/F Of Building J1No. 11 Kexiang Road, Science Park, Luogang DistrictGuangzhou, Guangdong 510663), 南方电网科学研究院有限责任公司 (中国广东省广州市萝岗区科学城科翔路11号J1栋3、4、5楼及J3栋3楼) filed a patent application (PCT/CN2025/114543) for "METHOD FOR PLUGGING AND REPAIRING OIL-FILLED SUBMARINE CABLE" on Aug 14, 2025. With publication no. WO/2026/066772, the details related to the patent a...