Replace original d.c. track circuit signal apparatus of London subways with a.c. equipment of condenser-fed type. (See also Elec. Traction vol. 27, no. 11, Nov. 1931 pp. 543-544, 2 figs; and Elec. Ry. Jl., vol. 75, no. 13, Dec. 1931, pp. 695-696, 3 figs)
Modernize London subway signal system
Traction Shop Roadway
Traction Shop and Roadway ; 4 , n 11
1931
3 pages
4 Figs.
Article (Journal)
English
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Modernize London subway signal system
Engineering Index Backfile | 1931
|Modernize London subway signal system
Engineering Index Backfile | 1931
|Engineering Index Backfile | 1946
|Tema Archive | 1984
Engineering Index Backfile | 1929