Electromechanical, mechanical, and automatic interlocking; centralized-traffic-control system and machine.
Committee II -- Interlocking
Am Ry Assn -- Proc
American Railway Association -- Meeting (Signal Section) ; 1934 Interlocking
American Railway Association -- Proceedings ; 31 , n 1
1934
83 pages
Conference paper
English
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Engineering Index Backfile | 1938
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Engineering Index Backfile | 1933
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Engineering Index Backfile | 1938