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2011-12-21T10:09:43-06:00
2011-12-21T09:56:48-06:00
2011-12-21T10:09:43-06:00
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Rock Island Develops a Unique System of Single-Track Station-to Station Automatic Block Based on Coded Track Circuits Without Line Wires
April 1946
Railway Signaling
Chicago
Rock Island & Pacific
Limon
CO
Omaha
NE
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Chicago, Rock Island & Pacific
Limon, CO
Omaha, NE
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