Installation of electrical interlocking system; automatic crossing-protection circuits at railroad crossings using inoperative and operative approach signals.
Committee III -- Power interlocking
Am. Ry. Assn. (Signal Section) -- Proc
American Railway Association -- Signal Section -- Proceedings ; 24 , n 2 ; p 261-272
1926
12 pages
Article (Journal)
English
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Committee III -- Power interlocking
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