一种配线框架，在水平面上装有所有外部线路，在垂直面上装有中心局设备的端线及它们的保护装置。
A distributing frame carrying on one side all outside lines, and on the other side the terminations of the central office equipment and protective devices for them.
一种配线框架，在水平面上装有所有外部线路，在垂直面上装有中心局设备的端线及它们的保护装置。
A distributing frame carrying on one side all outside lines, and on the other side the terminations of the central office equipment and protective devices for them.
应用推荐