Bare copper-covered steel line wire, .30% conductivity; bare copper-alloy line wire, 30% conductivity; bare hard-drawn copper-line wire; copper-converted steel-guy and messenger strand wires; bronze messenger cable; non-metallic underground cable.
Committee IX -- Overhead and underground lines
Assn Am Railroads -- Proc (Signal Sec)
Association of American Railroads -- Meeting ; 1936 Specifications
1936
12 pages
Aufsatz (Konferenz)
Englisch
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Committee IX -- Overhead and underground lines
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