值班: be on duty报务员: radio operator; brass pounde ...监听: monitor; monitoring无线电: radio; wireless求救: cry for help; ask sb. to com ...信号: signal; semaphore; gun器: implement; utensil; ware守: guard; defend听: hear; listen无线电求救信号: radio alarm signal; radio distress signal国际无线电求救信号: international distress signal used by ships and aircraft无线电求救信号频率: radio distress frequencies监听无线电台: monitoring station航空器无线电报务员: aircraft radil operator无线电求救呼号: a mayday call求救信号无线电波段: distress radio frequency无线电话中的求救信号: mayday无线电遇难求救信号: radio distress signal无线电报务员: brass pounder; radio officer; radio operator; radioman; radiooperator; radiotelegraph operator; wireless operator监听无线电接收器: monitoring radio receiver收听无线电。: listening-in船上无线电报务员: sparks空中无线电报务员: flight radio operator无线电报务员舱: wireless cabin无线电报务员证书: radiotelegraph operator's certificate
