Ключевые слова: background, bucket, bulldozer, deep, dig, digger, dozer, dredge, earth, ecology, environment, equipment, excavate, excavating, excavation, excavator, extreme, formation, geology, glass, gravel, heavy industry, hydraulic, large, layer, machine, manufacturing, mine, mineral, mover, open, ore, pebble, pit, quarry, quarrying, raw, resource, road, rock, rubble, sand, shovel, stone, surface, technology, truck, work,