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为什么铁轨之间要有一定的缝隙

更新时间: 2020-10-09 00:00:00     

1、铁轨的材料是钢铁,受环境影响会热胀冷缩,铁轨之间留一定的空隙避免夏天受热铁轨膨胀发生损坏;

2、方便铁轨铺设和维修更换;

3、避免火车行驶过程中与铁轨摩擦产生阻力;

4、减少火车转弯过程中对铁轨的损坏。

关键词: 为什么 铁轨 之间 一定 缝隙

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