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Most viewed - UR Interlocking
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 Hayford to East End - Rack #271 views
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 Western and Hayford Jct. - 15' Cabinet71 views
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 Model of U.R. for Brazil71 views
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 Santos Jundiai R.R. Brazil UR Control Machine71 views
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 Compressors at 13th St. Interlocking, Chicago Subway, C.R.T.71 views
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 G.E. Transformers, power panel, RPQ-41 Rectifiers and Relay panel in signal room AB-94 on continuous platform near Jackson.71 views
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 Kansas City Terminal UR Machine Tower #371 views
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 Kansas City Terminal UR Interlocking (UR Machine)71 views
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 Derail No. 67 on track 5 east of RU tower71 viewsElizabethport
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 Spring switch location at entrance to eastward yard, showing electric lock71 viewsUR Interlocking, Elizabethport
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 Babylon - G Relay Rack71 views
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 UR T.R.R.A. of St. L71 views
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 Hayford to East End70 views
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 Western and Hayford Jct. - 15' Cabinet70 views
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 Model of U.R. for Brazil70 views
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 Rack Mounted Equipment70 views
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 UR Machine - Central of Brazil69 views
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 Central of Brazil R.R. - Bel'm (UR)69 views
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 Model of U.R. for Brazil69 views
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 Santos Jundiai R.R. Brazil UR Control Machine69 views
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 Rear of relay rack in Relay Room, 13th St. Interlocking69 views
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 Southbound train at signal location A-18 and B-18, 13th St. Interlocking69 views
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 Chicago Subway Interlocking machine - Dearborn Street69 views
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 Preparing to remove plug-in type relays69 viewsElizabethport
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 A.C.Model 15 two position vane type track relays with quick detachable top69 viewsPlug in type relays and code transmitters
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 Eastward yard at Elizabethport69 views
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 UR T.R.R.A. of St. L69 views
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 UR T.R.R.A. of St. L69 views
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 Multiplex Equipment68 views
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 Central of Brazil R.R. - Bel'm (UR)68 views
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 Model of U.R. for Brazil68 views
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 Santos Jundiai R.R. Brazil UR Control Machine68 views
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