File:PSM V60 D146 Sections of good and bad railroad rails.png
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![File:PSM V60 D146 Sections of good and bad railroad rails.png](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/PSM_V60_D146_Sections_of_good_and_bad_railroad_rails.png/800px-PSM_V60_D146_Sections_of_good_and_bad_railroad_rails.png?20110726013459)
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