Ключевые слова: activity, building, business, construction, conveyer, design, dig, dirt, earth, economy, engineering, environment, equipment, factory, field, gravel, heap, heavy, industrial, industry, landscapes, large, machine, material, metal, mineral, mining, pile, pit, plant, production, quarry, sand, shoveling, sort, sorting, stack, steel, supply, technology, transportation, truck, view, work,