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a density, determined in a prescribed manner, equal to or less than 12 degrees API; (sables bitumineux)
a density, determined in a prescribed manner, equal to or less than 12 degrees API; (sables bitumineux)
a density, determined in a prescribed manner, equal to or less than 12 degrees API; (sables bitumineux)
a density, determined in a prescribed manner, equal to or less than 12 degrees API;