Ключевые слова: aridos, chippings, classification, clear, concrete, construction, conveyor belt, crushed, day, distribution, exploitation, giblets, grains of sand, gravel, gravel pit, industrial, industry, limestone, little, machinery, material, materials, mineral, mountain, nobody, outdoor, outer, pebbles, piedrecillas, quarry, ribbon, sand, small, stone, stones, sunny sky mining,