Chinese translation for "ring-down system"

振铃信号制

Similar Words：

"ring-dove" Chinese translation, "ring-down count" Chinese translation, "ring-down count rate" Chinese translation, "ring-down pulse" Chinese translation, "ring-down supervision" Chinese translation, "ring-down trunk" Chinese translation, "ring-down trunk signaling" Chinese translation, "ring-down-toll line" Chinese translation, "ring-downcount" Chinese translation, "ring-downcountrate" Chinese translation