Distribution switch control equipment manufacturing; Distribution switch control equipment sales; Import and export of goods; Outdoor goods sales; Sporting goods and equipment retail; Sales of electronic products; Sales of special equipment for environmental protection; Machinery and equipment sales; Hardware products retail; Instrument sales; Sales of labor protection products; Rubber products sales; Sales of non-metallic minerals and products; Metal material sales; Sales of plastic products; Fire equipment sales; Sales of chemical products (excluding licensed chemical products); Special chemical product sales