4. Railway switches and signals
  5. Crossings, frogs, and mates
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Device for determining the condition of railway switches or rail

Railway switches and signals – Crossings – frogs – and mates – Flange-supported wheel
Patent

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Direct support frog assembly

Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent

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Direct support frog assembly

Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent

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