Description: Installation of electrical and generating machinery; electric appliance installation services; repair and maintenance of electronic machines and apparatus, namely, ultrasonic cleaning machines; repair and maintenance of power distribution and control machines and apparatus; repair and maintenance of power generators; repair and maintenance of inverters; repair and maintenance of electric power converters; repair and maintenance of DC/AC power converters; repair and maintenance of electronic controllers for use with power converters; repair and maintenance of electric control panels; repair and maintenance of plugboards; repair and maintenance of switchboards; [ repair and maintenance of solar-powered electricity generators; ] repair and maintenance of metalworking machines and tools; repair and maintenance of welding machines; repair and maintenance of welding equipment; repair and maintenance of cutting machines; repair and maintenance of electroplating machines; repair and maintenance of galvanizing machines; repair and maintenance of semiconductor manufacturing machines and systems; repair and maintenance of electric lighting apparatus
