Ключевые слова: activity, assembly, belt, cheese, chemical, chemistry, company, complex, conveyor, device, economy, energy, engine, factory, fuel, hand, heat, heavy, indoors, industrial, industry, insurance, interior, laborer, labourer, line, machine, machinery, man, manufactory, manufacture, men, metal, milk, oil, operator, pipe, plant, power, producing, production, steel, structure, technical, technique, union, work, worker, workman,