i) The trade in mechanical, electromechanical and electronic devices and systems, consulting and technical assistance, and commercial marketing operations; ii) The construction, installation, maintenance and sale of: a) plants or machines for handling, dosing, screening, grinding, drying, evaporation, concentration of liquids, atomization, packaging and storage of bulk materials; b) plants or machines for controlling harmful emissions into the air, gaseous effluents and products of fossil and organic combustion, purification, dust removal, air filtration, river treatment, dust aspiration; c) sorbent injection systems for controlling acid gas emissions and biomass injection into boilers; d) electrical and electronic equipment and systems for industrial automation and all their accessories and spare parts; e) components and machines for pneumatic transport and their accessories; f) complete plants for the pneumatic and mechanical movement of bulk products; g) control systems for industrial automation.