基本解释行李艙支架；行李搬運車；載波中繼词组短语短語trunk line carrier channel 長途乾線載波信道exchange trunk carrier system 侷間中繼線載波系統exchange acidity trunk carrier system 侷間中繼線載波系統Carrier Trunk 載波中繼trunk carrier更多词组专业释义交通運輸工程行李艙支架