Wholesale marketing of ecologically advanced special plant materials and parts, such as electronic, electrical, electromechanical equipment, water purification systems and treatment of toxic industrial and urban waste, analysis systems, manufacturing, installation, technical assistance, testing, maintenance of radiogenic machines and radiation measurement and/or level probes, technical assistance, maintenance and testing of industrial plants in general, as well as any other activity directly or indirectly connected with the main activity, including the purchase and sale of real estate and participation in similar companies.