短語詞組短語propagation delay time [通信]傳播延遲時間;傳輸延遲時間;傳播延時間;繙譯tpt propagation delay time 傳播延時Propagation time -delay of ground-wave 地波傳播時延Propagation Delay Time HIGH -to-LOW Level 傳播延遲高到低Propagation Delay Time LOW -to-HIGH Level 傳播延遲低到高Time and propagation delay 時間與傳播延遲 返回 propagation time delay