短語詞組短語railway tank vehicle 鐵路罐車light railway engineering vehicle 輕軌作業(yè)車RTV railway test vehicle 鐵路試驗車railway measure vehicle 軌檢車railway test vehicle 鐵路試驗車輛railway construction vehicle 鐵路工程車輛railway survey vehicle 軌道檢測車railway maintenance vehicle 用軌道維護車 返回 railway vehicle