English translation for "用户数字交换系统"

customer digital switching system

Similar Words：

"用户数据文件" English translation, "用户数据协议" English translation, "用户数据组" English translation, "用户数量" English translation, "用户数目指标" English translation, "用户数字模拟控制器" English translation, "用户数字配线架" English translation, "用户水表" English translation, "用户顺序号码" English translation, "用户说明" English translation