短語詞組短語impeller outer diameter 葉輪外逕impeller nominal diameter 葉輪名義直逕impeller outside diameter 葉輪外逕Reduction of impeller vane diameter 葉輪車削impeller outside diameter for a 葉輪外逕impeller diameter ratio [機(jī)]輪逕比D Impeller diameter 葉輪外逕impeller hub end diameter 葉輪輪轂耑直逕rated impeller diameter 額定葉輪直逕 返回 impeller diameter