短語詞組短語impeller outer diameter 葉輪外徑impeller nominal diameter 葉輪名義直徑impeller outside diameter 葉輪外徑Reduction of impeller vane diameter 葉輪車削impeller outside diameter for a 葉輪外徑impeller diameter ratio [機]輪徑比D Impeller diameter 葉輪外徑impeller hub end diameter 葉輪輪轂端直徑rated impeller diameter 額定葉輪直徑 返回 impeller diameter