GENEVA, April 27 -- OUYANG, Mengyun (1801, Building 5, No.5 District, No.15 Courtyard, Wanshou RoadHaidian District, Beijing 100036), 欧阳梦云 (中国北京市海淀区万寿路甲15号院五区5号楼1801), FENG, Yuliang (Room 601, Unit 3, Building 6, Huayuting, No.17 Zhongxing RoadChangping District, Beijing 102299), 冯羽亮 (中国北京市昌平区中兴路17号院花雨汀6号楼3单元601) filed a patent application (PCT/CN2023/124699) for "MAGNETIC COUPLING PRECISE LIQUID BALANCE UNIT AND MAGNETIC COUPLING ...