Track ballast
Track ballast is the material which forms the trackbed upon which railroad ties (UK: sleepers) are laid. The term "ballast" comes from a nautical term for the stones used to stabilize a ship.
Track ballast is the material which forms the trackbed upon which railroad ties (UK: sleepers) are laid. The term "ballast" comes from a nautical term for the stones used to stabilize a ship.
Track ballast is the material which forms the trackbed upon which railroad ties (UK: sleepers) are laid. The term "ballast" comes from a nautical term for the stones used to stabilize a ship.
Source: Wikipedia "Track ballast" · CC BY-SA 4.0
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