您要查找的是不是：
- radiotelegraph distress signal 无线电报呼救信号
- Send out a distress signal; the ship is sinking. 船正在下沉，发遇险信号吧。
- The ship flew a distress signal at 7 a.m. 上午7时，那条船挂上了呼救的信号。
- The ship was flying a distress signal. 这船悬起遇险的信号。
- Air distress signal or interfering signal? 飞机遇险呼救还是干扰信号?
- The ship flew a distress signal at seven A.M. 上午7时，那条船挂上了呼救的信号.
- I transmitted a distress signal over the radio. 我通过无线电发出了一个求救信号。
- Oh! It's a tornado! Send distress signal now and put the alarm on! 啊!噢,这是飓风灾难,快发求救信号。快拉上警报。
- The survivors of the shipwreck transmitted a distress signal every hour. 失事船只的幸存者每小时发出一次遇难信号。
- I took my rescue team up as soon as we received their distress signal. 我们一接到他们遇险的信号，我就带着我的营救队上去了。
- international radiotelegraph distress frequency 国际无线电报救险频率
- international radiotelegraph distress fr 国际无线电报遇险频率
- For long range distress signaling from ships, lifeboats and li. 救生艇和救生筏长距离的遇险信号。
- For short range distress signaling from ships, lifeboats an. 救生艇和救生筏短距离的遇险信号。
- For short range distress signaling from ships, lifeboats and lif. 用于船舶、救生艇和救生筏短距离的遇险信号。
- When the captain found the ship was sinking rapidly,he ordered his men to send out a distress signal. 船长发现船在迅速下沉时就命令船员发了遇险信号。
- The SOS distress signal was transmitted for the first time when the Cunard liner Slavonia was wrecked off the Azores. 丘纳德远洋客轮"斯拉活尼亚号"在亚速尔群岛附近遇难时发出sos呼救信号，这是世界上第一次应用呼救信号。
- Alarm! Everyone take position. Send out distress signal and ask for help from vessels nearby! 拉响警报,全体船员各就各位,发出求救信号,向附近船只通告。
- Authorities say the crew sent forward distress signal shortly before the crowded passenger jet slammed into the ground. 当局说,在乘客猛撞到地面之前不久机上人员发出了求救信号。
- In 1906, the "SOS" distress signal was adopted at the International Radio Telegraphic Convention in Berlin. 1906年，在柏林举行的国际无线电通信大会上采用了SOS遇难信号。
