The distance between the running faces of the stock rail and gauge face of tongue rail measured at the heel of the switch is known as -
Heel divergence
Based on the definitions, the distance described in the question matches the definition of heel divergence. Therefore, the distance between the running faces of the stock rail and gauge face of tongue rail measured at the heel of the switch is known as Heel divergence.
The magazine in which Mahatma Gandhi mentioned what he wanted the Constitution to do is:
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