telegraph key

听听怎么读
英 [ˈtelɪˌgræf ki:]
美 [ˈtɛlɪˌɡræf ki]
是什么意思
  • 释义

    发报电键;

  • 英英释义

    telegraph key

    • n.key consisting of a lever that sends a telegraph signal when it is depressed and the circuit is closed
    学习怎么用

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