37 Contractor services, namely, review of and remedial recommendations for building plumbing, electrical and mechanical systems for others; HVAC contractor services; Installation and repair of electromechanical beverage preparation machines; Installation, maintenance and repair of apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Mechanical contractor 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; Repair or maintenance of machines and apparatus for processing foods or beverages