The manufacturing of equipment for hydro, thermal, electric power, and nuclear power is a category that produces core components such as turbines, boilers, generators, transformers, and pressure vessels, which constitute power plants and power transmission/distribution networks. These devices demand extremely high reliability, safety, and durability, and are characterized by the use of special heat-resistant and corrosion-resistant alloys, as well as the precision machining of large and thick-walled materials. Typical processing methods include large-scale machining, special welding for high-pressure applications, and strict quality control including non-destructive testing. Advanced technology and a quality assurance system compliant with international standards are indispensable, and this sector plays a crucial role in supporting social infrastructure.