Manufacturing of railway locomotives and vehicles; repair of railway locomotives and vehicles; construction engineering construction; manufacturing of special equipment; installation, repair, and testing of power transmission, power supply, and power receiving facilities; road cargo transportation (excluding dangerous goods). General items: Quenching processing; manufacturing of railway locomotive and vehicle accessories; repair of specialized equipment; human resources services (excluding vocational intermediary activities and labor dispatch services); labor services (excluding labor dispatch); repair of electrical equipment; repair of general equipment; manufacturing of flooring; sales of softwood products; manufacturing of softwood products; sales of labor protection supplies; leasing services (excluding licensed leasing services); leasing of construction machinery and equipment; leasing of mechanical equipment; sales of steel bars for construction; sales of timber; retail of hardware products; sales of building materials; sales of lightweight building materials; sales of daily necessities; sales of mechanical and electrical equipment; construction of earth and stone works; import and export of goods.