The Invention of the Track Circuit The history of Dr. William Robinson's invention of the track circuit, the fundamental unit which made possible our present automatic block signaling and interlocking systems

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Bibliographic Details
Main Author: Association, American Railway
Format: Electronic eBook
Language:English
Published: Project Gutenberg, 2014
Series:Project Gutenberg 45179
Online Access:http://www.gutenberg.org/etext/45179
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