Generally, track structure consists of track, rail pad, sleeper and ballast.

轨道结构一般包括轨道 、 轨道扣件 、 枕木、碎石垫层.

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Then the surviving at differentlevel is calculated by connecting track structure and phenomenological dynamic model.

用径迹结构模型计算出电离谱并与动力学模型相联系,计算出有实用价值的成活率.

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