UM.81: Difference between revisions
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(Created page with "Back to Control Functions ==Conversion from semi-automatic to automatic== The signal was converted from semi-automatic to automatic when Hay Lane Ground Frame was re...") |
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Latest revision as of 13:51, 9 November 2014
Back to Control Functions
Conversion from semi-automatic to automatic
The signal was converted from semi-automatic to automatic when Hay Lane Ground Frame was recovered in January 1974.
