Automatic Block Signal

This is an old revision of this page, as edited by Sturmovik (talk | contribs) at 13:16, 19 September 2011 (moved Automatic Block Signal to Automatic Block System: Article is about a type of block system, not simply automatic signals which may exist in other types of block system.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
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