短語詞組短語reduced d mass 約化質量reduced body mass 降低身體質量reduced effective mass 折合有效質量reduced mass velocity 對比質量流速reduced mass effect 約化質量效應reduced to fibrous mass 離解成纖維性物質reduced mass -flow 折合質量流量effect reduced mass 質量折合效應reduced mass detail 折合質量 返回 reduced mass