- electronic trunk circuit
- 电子: electron
- 中继电路: repeat circuit
- 出中继电路: outgoing trunk circuit
- 入中继电路: incoming trunk circuit
- 中继电路: connecting circuit; junction circuit; link circuit; tc trunk circuit; trunk circuit
- 中继电路制: relay network system
- 长途中继电路: toll junction circuit; trunk junction circuit
- 出中继电路群: outgoing trunk circuit group
- 回铃中继电路: ring back trunk circuit
- 汇接中继电路: tandem junction circuit
- 模拟中继电路: analog trunk circuit tac
- 去话中继电路: ogt outgoing trunk
- 振铃中继电路: ringing trunk circuit
- 中继电报电路: trunk telegraph circuit
- 中继电缆电路: tie cable circuit
- 终接中继电路: terminating trunk
- 电子继电路: electronic relay
- 长途双向中继电路: both way toll trunk circuit
- 长途线中继电路: toll line relay circuit; toll line trunk circuit
- 出中继电路测试: outgoing trunk circuit testing
- 话务员中继电路: operator trunk
- 立接长途中继电路: demand trunk circuit
- 双向振铃中继电路: two way ring down trunk circuit; two-way ring down trunk circuit
- 无线电中继电路: radio link
- 中继电路寻找顺序: trunk circuits hunting order
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