distress frequency

短語(yǔ)詞組

distress radio frequency 遇險(xiǎn)無(wú)線(xiàn)電頻率
radiotelephone distress frequency 無(wú)線(xiàn)電話(huà)遇險(xiǎn)頻率
DF Distress Frequency 求救頻率
international distress frequency [水運(yùn)][通信]國(guó)際遇險(xiǎn)呼救頻率;國(guó)際遇險(xiǎn)頻率;國(guó)際危難呼救頻率;翻譯
radiotelegraph distress frequency 無(wú)線(xiàn)電報(bào)遇險(xiǎn)頻率
radiotelephone distress frequency watch 無(wú)線(xiàn)電話(huà)遇險(xiǎn)頻率值班
telephone distress frequency 無(wú)線(xiàn)電話(huà)遇險(xiǎn)呼救頻率
idf international distress frequency 國(guó)際遇險(xiǎn)呼救頻率
international boundary distress frequency 國(guó)際遇險(xiǎn)呼救頻率