bn:11058319n
Noun Concept
Categories: Fills (earthworks), Permanent way
EN
track bed  ballast  railbed  track ballast  trackbed
EN
The track bed or trackbed is the groundwork onto which a railway track is laid. Wikipedia
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EN
The track bed or trackbed is the groundwork onto which a railway track is laid. Wikipedia
structure on railway lines supporting (in some cases, sleepers and) rails Wikidata
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