Read Edit View history 工频 gōngpín mains frequency Origin Definitions Defs Strokes Stroke Words Sentences Sents 工频 工頻 gōngpín mains frequency utility frequency; power frequency; the standard frequency of alternating current in an electrical power grid
工频 工頻 gōngpín mains frequency utility frequency; power frequency; the standard frequency of alternating current in an electrical power grid