37 Installation of building automation equipment, manufacturing machines and apparatuses in plants; Installation, maintenance and repair of apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Installation, maintenance and repair of automated industrial machinery, tools for automated manufacturing systems; Installation, maintenance, repair and reconditioning of industrial machinery; Machinery retrofit and conversion services; Providing technical support, namely, technical advice concerning the installation, repair and maintenance of electric or electronic apparatus, equipment and devices used for automated or partly automated industrial operations