Describes how system, in association with electric power signaling, has been practically applied.
Four-aspect colour light and power signalling southern railway
Ry. Gaz
Railway Gazette and Railway News ; 44 , n 13
1926
6 pages
11 Figs.
Aufsatz (Zeitschrift)
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
Four-aspect colour light signals
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