General: Water pollution control services; Mechanical equipment research and development; Mechanical equipment sales; Water resources special machinery and equipment manufacturing; Software development; Software sales; Intelligent instrumentation manufacturing; Intelligent instrumentation sales; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Industrial automation control system device manufacturing; Industrial automation control system device sales; Electronic components and electromechanical components equipment manufacturing; Electronic components and electromechanical components and equipment sales; Pumps and vacuum equipment manufacturing; Pumps and vacuum equipment sales; Metal cutting and welding equipment manufacturing; Metal cutting and welding equipment sales; Computer hardware and software and auxiliary equipment retail; Electronic measuring instruments sales; Network equipment sales; Metal products sales; Network technology services; Information technology consulting services (in addition to projects subject to approval by law, with a business license according to law and autonomy) business activities)