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Why Sand is the Secret Sauce for These Ecuadorian Trains

3,691 विचारों· 12/25/23
Smithsonian Channel
Smithsonian Channel
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1,606
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Tren Crucero trains rely on sand to go up and down steep inclines: on the way up, sand helps provide the wheels with traction on the steel tracks, while during a descent, it aids the electric...

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