Ключевые слова: activity, aggregate, aggregates, background, belt, breaker, bulldozer, clouds, construction, conveyor, conveyor belt, crushed stone, crusher, dig, digger, earth, enginery, equipment, excavate, excavation, excavator, extraction, gravel, heavy, industrial, industry, landscape, loader, machinery, mine, mountain, outdoor, pebble, pit, plant, power, power shovel, quarry, rock, sand, silo, stone, technology, transport, transportation, work,