Description of loud speaker intercommunication system installed by Southern Railway System in large freight yard at Birmingham, Ala, which provides 2-way conversation between yard master and switch crew foremen at numerous locations throughout yard and terminal area 5 mi long. (see also Ry Age v 121 n 9 Aug 31 1946 p 364-6)
Loud-speaker yard communication
Ry Signaling
Railway Signaling ; 39 , n 6
1946
6 pages
Aufsatz (Zeitschrift)
Englisch
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