4. Railways: surface track
  5. Stringers
  6. Concrete
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Concrete railroad bed

Railways: surface track – Stringers – Concrete
Patent

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Device for fastening a railway track on sleepers disposed end to

Railways: surface track – Stringers – Concrete
Patent

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Ladder-type sleepers and railway tracks

Railways: surface track – Stringers – Concrete
Patent

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Railroad track rail

Railways: surface track – Stringers – Concrete
Patent

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Railroad track system having vertically adjustable railroad tie

Railways: surface track – Stringers – Concrete
Patent

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