短語詞組短語low medium frequency radio range 低中頻無線電導(dǎo)航信標(biāo)LFRR Low -Frequency Radio Range 低頻無線電指向標(biāo)four -course low-frequency radio range 四航道低頻無線電信標(biāo)low frequency radio -range 低頻無線電導(dǎo)航信標(biāo)LFR Low Frequency Radio Range 低頻無線電范圍 返回 low frequency radio range