短語詞組短語bothway junction 雙向連接bothway trunk 雙向中繼線bothway operation 雙向操作bothway charge 雙向收費BWT BothWay Trunk 雙向中繼bothway exchange line 発著両用局線average bothway traffic 雙向平均業(yè)務量bothway tax return system 雙向納稅申報制度bothway toll trunk circuit 長途雙向中繼器 返回 bothway