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Addressing recommended replacement of certain components in Harmon Industries' "Electro Code 4"' and "Electro Code 4 Plus" intermediate signal units

Document Series
Safety Advisories
Safety Advisory Number
2000-02
Subject Signal and Train Control
Keywords
Signal and Train Control; symmetry distortion ; signal lighting ;
Document
sa2000_02.pdf (8.73 KB)

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Effective Date: Thursday, May 25, 2000