marine calling and distress radio telephony frequency
Related Translations:
遇险: meet with a mishap; be in danger; be in distress 短语和例子遇险船只 ship in distress; 他在那次飞机失事中遇险身亡。 he was killed by the air accident.; 遇险呼救信号 [讯] distress signal; 遇险信号 emergency signal; distress
遇险信号: distress calldistress messagedistress signalemergency signalsignal of distresssos
