GENEVA, Nov. 23 -- YUNNAN POWER GRID CO., LTD. (No.73 Tuodong RoadKunming, Yunnan 650000), 云南电网有限责任公司 (中国云南省昆明市拓东路73号), YUNNAN ELECTRIC POWER TEST & RESEARCH INSTITUTE (GROUP) CO., LTD. (No.105, Yunda West RoadKunming, Yunnan 650206), 云南电力试验研究院（集团）有限公司 (中国云南省昆明市云大西路105号) filed a patent application (PCT/CN2024/109607) for "METHOD, APPARATUS AND SYSTEM FOR STATE EVALUATION OF METROLOGI...