General projects: construction of specialized equipment for environmental protection; sale of specialized equipment for environmental protection; manufacture of dust technology equipment; manufacture of flue gas and sulphur defibrillation equipment; manufacture of slurry equipment; manufacture of general equipment (without special equipment); management of atmospheric pollution; management of water pollution; management of soil pollution and restoration services; solid waste management; engineering and technical research and experimental development; manufacture of electrical equipment; development of mechanical equipment; material handling equipment; manufacture of electrical power switches; manufacture of voltage, transformers and sensors; construction of electrical machinery; instrumentation and instrumentation; electrical cable operations; integration of information systems; software development; professional design services; installation of general mechanical equipment (with th...