Spray valve fittings, metal molds, metal parts, metal products, general machinery and equipment manufacturing, processing and sales, is engaged in the field of security technology in spray technology, technology development, technology transfer, technical consulting, technical services, spray materials, metal materials, building materials, chemical raw materials and products (except dangerous chemicals, monitoring civil explosives, chemicals and precursor chemicals), security equipment sales, operation of the enterprise products in the export business and the business of machinery and equipment, spare parts, raw materials import business (national companies to limit or prohibit the import and export of goods and technology except).