Production and sales of specialized equipment for environmental protection; production and sales of fiberglass and its products; production and sales of waste carbon fiber composite material processing equipment; research and development of carbon fiber recycling technology; sales of high-performance fibers and composite materials; manufacturing of high-performance fibers and composite materials; general equipment repair; electrical equipment repair; sales of electrical equipment; manufacturing of mechanical and electrical equipment; sales of pumps and vacuum equipment; research and development of machinery and equipment; sales of instruments and meters.