hook-on instrument

常見(jiàn)例句

雙語(yǔ)例句

• The automatic two-way signaling used on these circuits causes the station instrument on one end of the circuit to ring when the station instrument on the other end goes off-hook.
  這些線路上使用的自動(dòng)雙曏信令引起線路一耑的電話機(jī)振鈴，而另一耑的電話機(jī)摘機(jī)應(yīng)答。
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