industrial plant construction in the field of energy supply, environmental technology, clean room technology, air conditioning, energy and heat engineering; installation, assembly, maintenance and repair of machines, industrial buildings, energy supply plants, control measuring, and electro-technical units and industrial plants for energy, power, long distance energy, and compressed air production and supply, air conditioning and ventilation; building demolition, building sealing services; collection of trash, industrial and commercial specialized trash, from solid, muddy and liquid metallic and metal-containing industrial residue; shutdown and disposal of nuclear plants; hazardous waste management in the nature of clean-up of abandoned nuclear sites and flue gas cleaning

incineration, destruction, and combustion of trash, industrial and commercial specialized trash, from solid, muddy and liquid metallic and metal-containing industrial residue; waste water purification; environmental remediation services, waste water treatment services; settlement sludge recovery, recycling and incineration; recycling, thermic trash treatment and disposal by chemical, biological and metallurgical conversion into harmless material

construction engineering, engineering; research and technical consultation in the fields of environmental technology, energy technology, heat engineering, air conditioning, clean room technology, and nuclear technology; performing chemical analysis; designing and updating computer software for others; and leasing computer software; technical monitoring of industrial plants; testing of materials, namely, trash, industrial residue, waste water and residue of nuclear plants; technical project planning of industrial buildings, energy supply plants, control measuring, and electro-technical units and industrial plants for energy, power, long distance energy, and compressed air production and supply, air conditioning and ventilation