radiotelephone distress frequency
短语词组
- radiotelephone distress frequency watch 無線電話遇險頻率值班
- radiotelephone distress frequency watch receiver 無線電話遇險頻率值班收信機
- radiotelephone distress frequency watch receive 無線電話遇險頻率值班收信機 返回 radiotelephone distress frequency