pstn
abbr. 公用开关电话网络（Public Switched Telephone Network）
public switched telephone network,公共交换电话网络
angelet giga kudo querulously raised refrigerator wingman
生活查询工具
下载迅蛙App
下载迅蛙App
abbr. 公用开关电话网络（Public Switched Telephone Network）
public switched telephone network,公共交换电话网络
angelet giga kudo querulously raised refrigerator wingman