Ключевые слова: building, business, cement, concrete, construction, container, conveyor, environment, equipment, factory, feeder, gravel, heap, heavy, hill, hoppers, industrial, industry, machine, machinery, manufacture, manufacturing, material, metal, mineral, mixture, mortar, motor, outdoors, pipes, plant, process, processing, production, rock, rubble, sand, silo, site, sky, steel, stone, storage, structure, tank, technology, tower, warehouse, work, workplace,