English translation for "同步数字分层结构，同步数字传输体系"

synchronous digital hierarchy

Similar Words：

"同步数字层阶架构" English translation, "同步数字层阶结构" English translation, "同步数字处理" English translation, "同步数字传输网" English translation, "同步数字传输网络" English translation, "同步数字分层结构管理系统" English translation, "同步数字分级结构" English translation, "同步数字复用" English translation, "同步数字计算机" English translation, "同步数字交叉连接设备" English translation