Alloys of common metal; props of metal; steel pipes; arbours [structures] of metal; frames of metal for building; frames of metal for greenhouse; building materials of metal; fences of metal; flanges of metal [collars]; soldering wire of metal.

Calorimeters; cables, electric; photovoltaic inverter; solar wafer; integrated circuits; photovoltaic panel for the production of electricity; photovoltaic cells; solar panels for the production of electricity; photovoltaic installations and equipment for solar power generation; solar batteries.

Building construction supervision; construction; laying of cable; heating equipment installation and repair; installation and maintenance of photovoltaic equipment; installation and maintenance of solar thermal; installation and repair of lighting equipment; electric appliance installation and repair; vehicle battery charging; repair of power lines.