37 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; construction planning