Production of construction engineering machinery, hoisting machinery, parking garages, general equipment and electromechanical equipment (the manufacture of special equipment must be subject to the administrative license of the enterprise), metal products, rubber products, electronic products, steel wire reinforced hydraulic rubber hoses and hose assemblies, buses (excluding cars) and modified vehicles; sales and maintenance of construction engineering machinery, hoisting machinery, parking garages, general equipment and electromechanical equipment; metal products, rubber products and electronic products