English translation for "电话交换区设备"

exchange area facilities

Similar Words：

"电话交换记录单" English translation, "电话交换局" English translation, "电话交换局级别" English translation, "电话交换控制器" English translation, "电话交换区" English translation, "电话交换区设计" English translation, "电话交换设备总技术规范" English translation, "电话交换台" English translation, "电话交换台间" English translation, "电话交换网" English translation