Du kan inte välja fler än 25 ämnen Ämnen måste starta med en bokstav eller siffra, kan innehålla bindestreck ('-') och vara max 35 tecken långa.

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200px|thumb|left|I-Beam Rails

Rails are a structure, fastened using fasteners to sleepers and ballast to create a structure capable of supporting a locomotive engine moving at high speeds. To support this, rails are typically created from hot rolled steel, with the profile of an I-Beam.