Sale of electrical equipment, electronic appliances, sale of electrical appliances, sale of mechanical equipment, sale of mechanical equipment, sale of mechanical equipment, development of mechanical equipment, sale of pumps and vacuum equipment, distribution of technical services, technology development, exchange, technology transfer, extension of technology, distribution of computer hardware and hardware and assistive equipment, development of technology for regenerative use of resources, consultancy services for environmental protection, sale of instrumentation, general equipment repair, sale of specialized equipment for environmental protection, sale of gas, liquid separation and pure equipment, sale of metal products, wholesale of hardware, sale of plastics, distribution of plumbing equipment, sale of refrigeration, air conditioning equipment, sale of chemical products (without licensed chemical products), sale of solar heat products, consultancy on enterprise management, advis...