4. Railway switches and signals
  5. Grade-crossing track protection
  6. Automatic
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Method and apparatus for automatic train control in a...

Railway switches and signals – Grade-crossing track protection – Automatic
Reexamination Certificate

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Method and apparatus for uniform time warning of railroad...

Railway switches and signals – Grade-crossing track protection – Automatic
Reexamination Certificate

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Train noise elimination system

Railway switches and signals – Grade-crossing track protection – Automatic
Reexamination Certificate

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