短语词组短語freight tariff mileage 貨物運價裡程conversion of freight mileage 換算周轉量;換算貨物周轉量conventional of freight mileage 換算周轉量minimum freight mileage 起碼計費裡程ton -miles freight mileage 貨物周轉量mileage freight system 裡程運價制 返回 freight mileage