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测定了矫直前后钢轨外形尺寸变化（包括轨头宽度、轨高、钢轨长度），分析了轨高减少的原因。通过试验室模拟，提出了轨高减少的变形机理。
The changes of rail dimensions (including rail head width, rail height and rail length) before and after straightening were measured, and the reasons for the reduction of rail height were analyzed. Through the laboratory simulation, the deformation mechanism of rail height reduction is proposed.