Sales of electrical machinery equipment; Capacitor and its supporting equipment sales; Electronic special equipment sales; Agricultural and sideline food processing special equipment sales; Environmental protection special equipment sales; Security equipment sales; Plastic processing equipment sales; Optical communications equipment sales; Slide and projection equipment sales; Internet equipment sales; Communications equipment sales; Computer hardware and software and auxiliary equipment wholesale; Electrical equipment sales; General mechanical equipment installation service; Plastic products sales; Mechanical equipment sales; General feeding, distribution device sales; Domestic trade agent; Home appliances parts sales; Furniture parts sales; Sales of wearable intelligent equipment; Sales of power electronic components; Sales of electronic components and electromechanical components; Retail of electronic components; Wholesale of electronic components; Sales of electronic products; Import and export agents; Technology import and export; Import and export of goods;