Chinese translation for "数字电话交换业务"

digital telephone switching service

Similar Words：

"数字电话" Chinese translation, "数字电话电路业务" Chinese translation, "数字电话机" Chinese translation, "数字电话交换机" Chinese translation, "数字电话交换局" Chinese translation, "数字电话设备" Chinese translation, "数字电话网" Chinese translation, "数字电话网络" Chinese translation, "数字电话系统" Chinese translation, "数字电话学" Chinese translation