37 Maintenance, repair, and installation of refinery and petrochemical equipment, namely, exchangers, towers, furnaces, burners, heaters, valves, tanks, vessels, piping, pipelines, and reactor processing equipment; Industrial maintenance turnaround services, namely, repair and maintenance of equipment and machinery in the refinery and petrochemical industries; consultancy in the fields of facility turnarounds, namely, consultation regarding the repair, maintenance and modification of industrial equipment and machinery in the refinery and petrochemical industries; Consultancy regarding repair and maintenance of industrial equipment in the refinery and petrochemical industries, namely, exchangers, towers, furnaces, burners, heaters, valves, tanks, vessels, piping, pipelines, tank farms; Maintenance of industrial facilities, namely, bundle extraction provided as maintenance of heat exchangers; Repair and installation of industrial equipment in the refinery and petrochemical industries, namely, exchangers, towers, furnaces, burners, heaters, valves, tanks, vessels, piping, pipelines, and reactors; Maintenance of industrial facilities, namely, catalyst handling in the nature of loading, unloading and screening of catalysts provided as maintenance of petrochemical refinery equipment; Heat exchanger maintenance services in the nature of repair and installation of venting and plugging tubes and seal strips; Industrial facility maintenance turnaround services, namely, repair and maintenance of petrochemical refinery equipment; Repair of industrial heat exchangers, namely, coded weld repairs; maintenance and modification of industrial equipment and machinery in the refinery and petrochemical industries, namely, repair and modification of furnaces, boilers and heaters; Construction, installation, repair and maintenance of electrical substation assemblies and structural components therefor and skid-mounted electrical substations; construction services, namely, installation services and construction of electrical transmission and electrical generation facilities for conducting, switching, transforming, accumulating, regulating and or controlling electricity; construction services, namely, pre-construction visualization in the nature of planning and laying out of electrical transmission facilities, electrical generation facilities, and electrical substations, and planning for sequencing of construction; Applying protective coatings to metal by means of painting