Specification for electromechanical interlocking machine, unit electric levers, and locking. Report of Committee II. (See also - meeting Mar 13-15, 1923, pp. 182-195)
Mechanical interlocking
Am. Ry. Assn. (Signal Section) -- Advance Notice
American Railway Association -- Meeting ; 1923 Interlocking
1923
15 pages
Conference paper
English
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Committee II -- Mechanical interlocking
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