General mechanical equipment installation services; mechanical equipment sales; mechanical equipment leasing; mechanical equipment research and development; environmental protection special equipment manufacturing; electronic special equipment manufacturing; special equipment repair; environmental protection special equipment sales; mining machinery manufacturing; mining machinery sales; construction engineering machinery manufacturing; construction engineering machinery sales; construction engineering machinery and equipment leasing; tunnels Manufacturing of special machinery for construction; sales of special machinery for tunnel construction; repair of instruments and meters; sales of supply instruments and meters; retail of electronic components; sales of hydraulic power machinery and components; sales of labor protection supplies; retail of hardware products; sales of packaging materials and products; wood processing; processing of construction wood and wood components; manufacturing of daily wood products; metal packaging containers and materials Manufacturing; sales of building materials; rental of cultural supplies and equipment; sales of office supplies; sales of lighting fixtures; manufacturing of metal daily necessities; manufacturing of metal products for safety and fire protection; manufacturing of non-ferrous metal alloys; sales of non-ferrous metal alloys; sales of pipeline transportation equipment; wholesale of kitchenware, sanitary ware and daily sundries; operation of wires and cables; manufacturing of sanitary ware; sales of sanitary ware; motorcycles Wholesale of automobiles and spare parts; manufacturing of fasteners; sales of fasteners; manufacturing of plastic products; manufacturing of plastic packaging boxes and containers; electroplating processing; spraying processing; manufacturing of coatings (excluding hazardous chemicals); sales of coatings (excluding hazardous chemicals); wholesale of automobile parts; sales of plastic products; sales of cork products; sales of metal packaging containers and materials; manufacturing of automotive decorative supplies.