The international morse code distress signal, S.O.S.
国际通用的莫尔斯电码遇险信号SOS。
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。
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。
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