Ключевые слова: activity, background, belt, building, business, construction, conveyor, dig, dust, earth, ecology, environment, equipment, excavation, excavator, extraction, factory, gravel, heap, heavy, industrial, industry, landscape, large, loading, machine, machinery, manufacturing, material, mine, mineral, mining, mountain, open, ore, outdoors, outside, pit, plant, quarry, resource, road, rock, sand, site, stone, technology, transportation, work, yellow,