Production of magnetic materials; sales of magnetic materials; manufacturing of seals; sales of seals; manufacturing of rubber products; sales of rubber products; manufacturing of plastic products; sales of plastic products; R&D of household appliances; manufacturing of household appliances; sales of household appliance spare parts; R&D of new material technology; Manufacturing of synthetic materials (excluding hazardous chemicals); Sales of synthetic materials; Production of battery spare parts; Sales of battery spare parts; glass manufacturing; manufacturing of daily glass products; sales of daily glass products; mechanical equipment research and development; special equipment manufacturing (excluding licensed professional equipment manufacturing); mechanical equipment sales; mechanical equipment leasing; mold manufacturing; mold sales; technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; import and export of goods