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> RESSOURCES (utilisation des ressources) > utilisation des ressources > extraction > activité minière > extraction de gravier Obtaining a mixture of coarse sand and small water- worn or pounded stones, (used for paths and roads and as an aggregate) from the earth.
extraction de gravier
Obtaining a mixture of coarse sand and small water- worn or pounded stones, (used for paths and roads and as an aggregate) from the earth.
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