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Maintainers and computer racks30 views
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Maintainers and computer racks28 views
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Automatic Switching Equipment39 views
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Automatic Switching Equipment with maintainer33 views
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Automatic Switching Machine34 views
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Cab, hump and trimmer signal controls on automatic switching machine33 views
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Cab signal in hump locomotive35 views
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Trimmer signal34 views
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Switch machine positioned ahead of each cut27 views
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Switch machine32 views
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Model 31 car retarder with HS-1 valves in foreground27 views
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HS-1 valve28 views
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Car weighing device28 views
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Car passing over car weighing device28 views
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Car wheel counter for track fullness29 views
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Car approaching car wheel counter29 views
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E. Conway Hump with W. Conway in background28 views
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NMEA Building and General Yardmasters office33 views
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NMEA Building and General Yardmasters office29 views
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Differential Pressure Unit33 views
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Differential Pressure Unit30 views
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Differential Pressure Unit30 views
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Auxiliary Exhaust Valve33 views
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Car speed is measured as each cut goes through master retarder30 views
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Cars are cut near top of crest30 views
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Car rollability on tangent track on car weight are measured near crest of hump32 views
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Car speed is measured as each cut goes through master retarder34 views
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Classification track from retarder control tower35 views
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Wheel counter and group retarder34 views
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Group retarders and classification tracks35 views
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Cars roll past yardmasters office into classification track33 views
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Operator at Retarder console38 views
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