Ключевые слова: aggregates, building material, construction, construction material, conveyor, conveyors, grain, grain size, gravel, gravel extraction, gravel pit, gravel plant, gravel winning, gravel works, heap, industry, mountain, mountains, outdoors, outside, pebble, quarry pond, road building, rock, sand, sand mining, sand mountain, sieved, sifted fine grained, stones, stretch,