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.
对重叠回线装置而言，法线是垂直于回线平面、并通过线框中心点的一条直线。
In terms of the normal-wrapping installation, the normal is a straight line through the center point of linear framework.
提出了一种基于点与直线关系从正轴测画隐线图建立平面立体线框模型的新方法。
Then we propose a new method of reconstructing three-dimensional models from two-dimensional hidden-part-drawn line drawings.
提出了一种基于点与直线关系从正轴测画隐线图建立平面立体线框模型的新方法。
Then we propose a new method of reconstructing three-dimensional models from two-dimensional hidden-part-drawn line drawings.
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