bn:03108063n
Noun Concept
Categories: Permanent way, Transportation engineering, Pavements, Road transport
EN
subgrade  formation  formation level  Lime Subgrade Stabilization  railway bed
EN
In transport engineering, subgrade is the native material underneath a constructed road, pavement or railway track. Wikipedia
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EN
In transport engineering, subgrade is the native material underneath a constructed road, pavement or railway track. Wikipedia
The layer of native soil on which the foundation of a road is laid. Wiktionary
Layer of soil under the road. Wiktionary (translation)
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