Electric, electro-mechanical and mechanical interlocking; centralized traffic control system and machine; rail locking devices used on interlocked drawbridges; protection of drawbridges.
Committee II -- Interlocking
Assn Am Railroads -- Proc (Signal Sec)
Association of American Railroads -- Meeting ; 1937 Interlocking
Association of American Railroads -- Proceedings Signal Section ; 34 , n 2 ; p 587-592
1937
6 pages
Aufsatz (Konferenz)
Englisch
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