Electropneumatic switch operating mechanism; electropneumatic interlocking; automatic interlocking; centralized traffic control; centralized traffic control machine; switch, frog and crossing layout plans; electric motor switch operating mechanism; electromechanical interlocking machine.
Report of committee II -- Interlocking
Assn Am Railroads -- Advance Reports (Signal Sec)
1943
Report
English
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Report of committee II -- Interlocking
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