04
Biofuels; fuels; electrical energy; fuel gas; oil-gas;
solidified gas (fuel)
07
Feeding apparatus for machine boilers; scale collectors for
machine boilers; steam condensers (parts of machines);
steam/oil separators; heat exchangers (parts of machines);
filters (parts of machines or engines); electricity
generators; condensing installations; dust exhausting
installations for cleaning purposes; suction machines for
industrial use; pressure regulators; separators; blowing
machines for the compression, exhaustion and transport of
gases; superheaters; superchargers
11
Regulating and safety accessories for water and gas
installations; heat accumulators; steam accumulators;
heating apparatus for solid, liquid or gaseous fuels; gas
scrubbing apparatus; burners, boilers and heaters; heating
apparatus; distillation columns; heat exchangers; chemical
treatment equipment; heating equipment; evaporators;
ovens, other than for laboratory use; hearths; steam
boilers other than machine parts; incinerators; automatic
ash conveyor installations; hot water heating installations;
steam production installations; industrial treatment
installations; gas scrubbers (parts of gas installations);
refining towers for distillation
37
Construction consultation; factory construction;
construction of plants and installations for electricity and
gas (industrial installations); burner maintenance and
repair; maintenance and repair of solid, liquid or gaseous
combustion heating apparatus; maintenance and repair of
industrial heating equipment; construction information;
information relating to the repair of installations for
electricity and gas; heating equipment installation and
repair; furnace installation and repair; irrigation devices
installation and repair; installation and repair of devices
for production, collection and distribution of gas;
installation and repair of refrigerating apparatus for
industrial purposes; cleaning and repair of industrial
boilers; building construction supervision
40
Rental of boilers; destruction of waste and trash;
production of energy; rental of generators; refining
services; recycling of trash and waste; waste treatment
(transformation); sorting of waste and recyclable raw
material (transformation); recycling of waste
42
Architectural services; architectural consultancy; energy
auditing; advice related to energy saving; technological
consultancy services; quality control; technical project
study; surveying (engineering work); scientific information
and advice on carbon offsetting; engineering; construction
drafting services; research and development of new products
for others; technical research; physics research;
mechanical research; biological research services;
environmental protection-related research