Electro-pneumatic switch operating mechanism; requisites for mechanically locking levers of interlocking machines; wiring; protection of traffic against slides and rock falls. (See also - n 1 Mar 13 1939 p 35-60)
Committee II -- Interlocking
Assn Am Railroads -- Proc (Signal Sec)
Association of American Railroads -- Meeting ; 1939 Interlocking
1939
5 pages
Aufsatz (Konferenz)
Englisch
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Engineering Index Backfile | 1938
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Engineering Index Backfile | 1933
Engineering Index Backfile | 1938