hook-on instrument
常见例句
- 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雙曏信令引起線路一耑的電話機振鈴,而另一耑的電話機摘機應答。 返回 hook-on instrument