下位关系 subordinate relationships ; Hyponym ; hyponymy among verbs

上下位关系 Hyponymy ; hyponymy relation ; superordinate and hyponym ; hypermymy & hyponymy

下位机系统 Lower position machine system ; AlgoWorks

水下定位系统 NASPos USBL position system ; subsea positioning system ; Underwater Positioning System

上下位机测控系统 Single Chip and PC Controller

下位关系和蕴涵关系 troponymy and entailment

下位机系统软件为 Proficy Cimplicy Machine Edition