created sense approved 异频雷达收发机/異頻雷達收發機 · yìpínléidáshōufājī · transponder
异频雷达收发机 / 異頻雷達收發機
yìpínléidáshōufājī
transponder
an electronic device that receives a radio signal and automatically emits a different signal in response
飞行员开启了异频雷达收发机，以便地面控制中心识别飞机。