Ключевые слова: accumulate, aggregates, and, angular, background, boulder, breakstone, building, cement, construction, crushed, dry, grain, granite, gravel, grey, ground, group, heap, industrial, industry, isolated, limestone, macadam, masonry, material, mine, mineral, mountain, natural, pebbles, pile, quarry, road, roads, rocks, rough, rubble, sand, small, solid, stone, stones, surface, white,