Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Signal maintenance on the frisco
Interesting records of primary battery operation on 884 miles of road signaled with semaphores; average cost of maintenance and operation per signal, per month in 1927 was $8.95; details of construction; signal maintenance organization.
Signal maintenance on the frisco
Interesting records of primary battery operation on 884 miles of road signaled with semaphores; average cost of maintenance and operation per signal, per month in 1927 was $8.95; details of construction; signal maintenance organization.
Signal maintenance on the frisco
Ry. Signaling
Railway Signaling ; 21
1928
4 pages
8 Figs.
Aufsatz (Zeitschrift)
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
D. C. Signal Construction on Frisco
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