Comparison was made for inter floating roof tank with fixing roof tank. Special-purpose Equipment Manufacturing Plant can manufacture over 3000 sets of PSA special program-controlled valve per year; Wherein research and development center for special activator and desulfurizer is to produce active carbon, ferric oxide and hydraulic desulfurizer, etc. Basing on research and development, high performance engineering, this company is to maximize returns of clients so as to make duel-win between company and clients, share the chance and the great achievements of the economic development of China.