Metal structures for mounting solar panels or photovoltaic plants; metal ballasts, namely, mounts for solar panels or photovoltaic plants; substrates primarily of metal being profiles and frames for supporting solar cells, photovoltaic cells and solar collectors; reinforcing materials of metal for building purposes for solar or photovoltaic plants; construction elements made of metal, namely, supports for solar panels or photovoltaic plants; framework of metal for building; rods of metal for ...