“automatic-alarm-signal keying device”的概念、定义、翻译、参考文献-科学参考

单词	automatic-alarm-signal keying device
释义	automatic-alarm-signal keying device [¦ȯd·ǝ¦mad·ik ǝ`lärm ´sig·nǝl `kē·iŋ di´vīs] ^{COMMUNICATIONS} A device capable of automatically keying the radiotelegraph transmitter on board a vessel to transmit the international automatic-alarm signal, or to respond to receipt of an internationally agreed-upon distress signal and wake up the radio operator on ships not having a 24-hour radio watch.
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