Chuo Seisakusho, Ltd. is a company mainly engaged in the manufacture of power-supply equipment. The Power-Supply Equipment segment is engaged in the manufacture and sale of power-supply equipment with a focus on direct-current (DC) power supply devices for industrial and academic use. The Surface Processing Device segment offers surface processing devices for coating, alumite treatment, chemical conversion treatment and electrophoretic coating, among others. The Electrical Welder segment provides electrical welding devices with a focus on spot welders. The Environmental Equipment segment offers effluent treatment machines and ion-exchange equipment. The Others segment is engaged in the manufacture and sale of electrolytic machines, the development of electrolytic processing technology, and others.