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Quality Control Test Apparatus36 views
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Quality Control Test Apparatus31 views
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Quality Control Test Apparatus34 views
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Quality Control Test Apparatus34 views
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Quality Control Test Apparatus32 views
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Quality Control Test Apparatus31 views
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Quality Control Test Apparatus34 views
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Quality Control Test Apparatus34 views
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Right and Left Hand lay-outs for T-20 and T-21 Switch Stands29 views
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Schematic Drawings showing Operation of a Mechanical Facing Point Lock Applied to a Spring Switch31 views
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Operator using ITC Equipment, Drawn from Photo Taken at Frenchtown on Bel Dell Division, P.R.R.37 views
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Line Drawing of Electro-Pneumatic Interlocking of Cincinnati Terminal, P.R.R.39 views
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Centralized Traffic Control Machine Drawn from Photo of Union Pacific's Las Vegas to Yermo Machine40 views
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Line Drawing of Signal Bridge with Position Light Signals, P.R.R.43 views
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Drawing of Conductor Using ITC Equipment - Taken on Bel Dell Division - PRR38 views
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Drawing - Engineman Using ITC Equipment - Taken on Bel Dell Division - PRR37 views
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"Union" Car Retarder Equipped Yard - Enola Yard, P.R.R.42 views
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Cab Signaling Interior of Cab of one of Rock Island's Rocket Locomotives42 views
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Coded Carrier Control (Electronics)42 views
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Train Communication (Electronics)42 views
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Cab Signaling (Electronics)34 views
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M-22A Gear Assembly37 views
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Railroad Trade Marks from Signalman's Journal53 views
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M-22-A Gear Assembly42 views
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A.T.& S.F.R.R. - Canadian-Waynoka47 views
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T-21 Switch Stand42 views
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60 views
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48 views
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43 views
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Central Railroad of New Jersey49 views
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45 views
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C.T.C. Map58 views
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