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Railroads--Automatic train control

ComplexSubject sh85110909 · TF638 · id.loc.gov

Used for

  • Automatic train control
  • PTC (Positive train control)
  • Positive train control
  • Railroad trains--Automatic train control
  • Railroads--Automatic speed control
  • Railroads--Automatic stop

Broader Terms (2)

Hierarchy

Broader groupings: