37 Installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of processing machines for shaping, cutting, sizing, polishing, chamfering natural stones, artificial stones, agglomerated stones, ceramics, metallic materials, glass, composite and plastic materials; installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of numerically controlled machine tools for shaping, cutting, sizing, polishing, chamfering natural stones, artificial stones, agglomerated stones, ceramics, metallic materials, glass, composite and plastic materials; installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of machines for the manufacture of artificial stones, agglomerated stones and ceramic materials; installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of transport systems, consisting of conveyors and handling equipment, for the transfer of natural stones, artificial stones, agglomerated stones, ceramics, metal materials, glass, composite and plastic materials; installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of installations being machines for the processing of natural stones, artificial stones, agglomerated stones, ceramics, metallic materials, glass, composite and plastic materials; installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of installations being machines for the handling of natural stones, artificial stones, agglomerated stones, ceramics, metallic materials, glass, composite and plastic materials; installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of installations being machines for the manufacture of natural stones materials, artificial stones, agglomerated stones, ceramics, metallic materials, glass, composite and plastic materials; installation services of blocks, slabs, tiles, floor tiles, roof tiles for indoor and outdoor flooring, for interior and exterior wall cladding, for building roofing, for building construction and for construction of furniture; repair and replacement of blocks, slabs, tiles, floor tiles, roof tiles for indoor and outdoor flooring, interior and exterior wall cladding, building roofing, building construction and furniture construction; installation maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of numerically controlled machine tools for the processing of natural stones, artificial stones, agglomerated stones, ceramics, metallic materials, glass, composite and plastic materials; installation, maintenance, repair and technical advice related to the installation, maintenance, repair, and operation of machines for 3d printing of sintered, plastic, resinous and metallic materials