4. Railways: surface track
  5. Roadbed
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Tie-down system for railroad grade crossing

Railways: surface track – Roadbed – Continuous
Patent

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Track

Railways: surface track – Roadbed
Patent

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Track structure for railborne vehicles, particularly trains

Railways: surface track – Roadbed – Continuous
Reexamination Certificate

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Two-block concrete railroad tie for a fixed rail carriageway

Railways: surface track – Roadbed
Reexamination Certificate

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