短語詞組短語flow -in 動式flow resistance in downcomer 下降管流動阻力flow condition in pipeline 流動狀態(tài)flow velocity in canal 渠道流速flow feeder in convection 對流氣流flow separation in 分離流動flow feeder in 流進flow noise in pipings 管道噪聲flow profiles in river 河道水面線 返回 flow in