GENEVA, June 1 -- YUNNAN POWER GRID CO., LTD. TRANSMISSION BRANCH (Yangxianpo No. 1, Wuhua DistrictKunming, Yunnan 650000), 云南电网有限责任公司输电分公司 (中国云南省昆明市五华区羊仙坡一号), YUNNAN ELECTRIC POWER TESTING AND RESEARCH INSTITUTE (GROUP) CO., LTD (Yundian Technology Park, No. 105 Yunda West Road, Economic and Technological Development ZoneKunming, Yunnan 650217), 云南电力试验研究院（集团）有限公司 (中国云南省ਲ਼...