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Nonfixed pathway
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A pathway in which a vehicle has freedom to move in various directions.
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Pig
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A barrel-shaped brush used to clean pipelines.
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Railroad
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A permanent road made of a line of tracks fixed to wooden or concrete ties.
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Rolling stock
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A railroad car pulled by a locomotive.
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Sledge
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An early example of the modern sled, built using logs.
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Slurry
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A mixture of a ground solid and a liquid.
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Stationary pathway
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A transporting path in which the structure does not move.
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Straight truck
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A truck that has one frame that connects both the front and rear axles.
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Subway
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A heavy-rail train that runs on a rail below the earth's surface.
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Tank car
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A freight car that is a large tank on wheels for transporting liquids.
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Transmission line
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A pipe in a pipeline system that transports cargo over great distances.
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Transport car
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A flatcar with side rails. It is mainly used for transporting new vehicles from manufacturing plants to car dealers.
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Unit train
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A train that carries only one type of cargo.
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