37 Installation, maintenance and repair of gas turbines, steam turbines, wind turbines, compressors, boilers, pumps, motors, control systems, engines, and industrial equipment parts; Power plant operation services, namely, maintenance and repair of power plants and power plant equipment; Power plant upgrade services, namely, installation, maintenance and repair of power plants and power plant equipment; Technical support services, namely, providing system upgrades, maintenance, installation of computer hardware; Technical support services related to modular replacements, namely, modular replacement installation of of gas turbines, steam turbines, wind turbines, compressors, boilers, pumps, motors, control systems, engines, and industrial equipment parts; Technical support services related to scheduled and forced power plant outages and power plant start-up support, namely, troubleshooting in the nature of technical advice and repair of gas turbines, steam turbines, wind turbines, compressors, boilers, pumps, motors, control systems, engines, and industrial equipment parts