harmonic ringer

基本解释选频铃

网络释义

1)harmonic ringer,选频铃2)telering,电话振铃频选器3)frequency-selective ringing,harmonic ringing,选择振铃4)ring signal,铃频信号5)signalling frequency,振铃频率6)semiselective ringing,半选择振铃

用法和例句

The reasons and improvement for interference of ring signal while transferring remote signal for ZDD-12 PLC;

ZDD—12型机转接电路中铃频信号串扰的原因分析

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