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So this is why train wheels are conical

Monday May 6, 2019. 05:00 PM , from BoingBoing
Watch this short video to understand why train wheels are conical instead of cylindrical and why they have rigid axels.
Read more at BoingBoing
https://boingboing.net/2019/05/06/so-this-is-why-train-wheels-ar.html
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