42 Technical planning and consulting; technical planning regarding the design of machines and machine parts for gas circulation, gas purification, particle removal, filtration, separation, passivation of separated process by-products, recycling and processing of separated particles, pneumatic conveying, drying and processing of powdery substances, as well as heat recovery; Development, installation, maintenance, updating and servicing of software for the control and monitoring of systems for gas circulation, gas purification, particle removal, for the filtration, for the separation, for the passivation of separated process by-products, for the recycling and processing of separated particles, for the pneumatic conveying, drying and processing of powdery substances and for heat recovery; development, installation, maintenance, updating and servicing of software for the control and monitoring of filters, of valves, of frequency converters, of frequency inverters, of switch cabinets and of control cabinets; Technical monitoring and inspection of machines and machine parts, of filters and valves, of installation cabinets, of housings, of switch cabinets, of control cabinets, of electric and electronic measuring, signaling, checking, supervision, switch and control apparatus and instruments, of frequency converters, of frequency inverters, of heat recovery systems, heat recovery units and heat recovery apparatus, of data processors and of computers; Hosting services, software as a Service [SaaS] and rental of software.