钢轨磨耗是否超限直接决定钢轨是否需要更换或打磨，否则将造成重大损失。
Whether we need to change or fix rail decides from whether it reaches the threshold, or it will bring terrible lost.
钢轨磨耗是否超限直接决定钢轨是否需要更换或打磨，否则将造成重大损失。
Whether we need to change or fix rail decides from whether it reaches the threshold, or it will bring terrible lost.
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