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电话机的振铃电路是电话机的一个重要组成部分,由于要经常受到高压铃流或雷击产生的高压脉冲的冲击,因此振铃电路是电话机故障率最高的电路之一。
The ringing circuit of a telephone is an important part of the telephone and one of the circuits with the highest telephone failure rate is the ringing circuit, which is frequently hit by high-voltage pulses generated by high-voltage ring currents or lightning strikes.