distress frequency
短语词组
- distress radio frequency 遇险无线电频率
- radiotelephone distress frequency 无线电话遇险频率
- DF Distress Frequency 求救频率
- international distress frequency [水运][通信]国际遇险呼救频率;国际遇险频率;国际危难呼救频率;翻译
- radiotelegraph distress frequency 无线电报遇险频率
- radiotelephone distress frequency watch 无线电话遇险频率值班
- telephone distress frequency 无线电话遇险呼救频率
- idf international distress frequency 国际遇险呼救频率
- international boundary distress frequency 国际遇险呼救频率 返回 distress frequency