带有边缘梁的壳在别的地方已加以详细讨论。
深度使胎面的I -梁适合松散和中型包装条件，深领域的松散的泥土的边缘附近的轨道。
The depth of the tread makes the I-Beam well suited to loose and medium-packed conditions with deep areas of loose dirt around the edges of the track.
首次提出中间驱动方式，能较好地解决轨道梁产生的挠度、边缘效应等对机械和电气性能的影响。
Intermediate driving way is put forward for the first time and can solve influence of deflection and edge effect come from rail beam on mechanical and electric performance.
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