Details of electric black and yellow signals and their operation for indicating end of feed line, damaged sections of line, protective sections (where several lines meet), etc.
Signaling in electric railway operation of swiss federal railways
Signale des elektrischen Zugbetriebes bei den Schweizerischen Bundesbahnen
Elektrische Bahnen ; 2 , n 3
1926
3 pages
7 Figs.
Article (Journal)
German
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