Ключевые слова: activity, aggregate, background, belt, bite, building, chop, construction, conveyor, crush, dust, earth, equipment, excavation, factory, gravel, grind, harp on, heavy, industrial, industry, itch, job, landscape, machine, machinery, manufacturing, material, metal, mill, mince, mine, mineral, mountain, pit, plant, pound, quarry, sting, stone, transportation, work,