42 Infrared thermography services; predictive maintenance inspections of mechanical devices, buildings, boilers, refractory devices, and electrical devices, namely, lighting panels, circuit breakers, distribution systems, transmission lines, substations, power supply units, computer chips, circuit boards, switch boards, controls, signaling equipment and motors; and inspections of machinery, boilers, electrical, mechanical, and rotating machinery, and refractory devices, all through use of infrared imaging devices