Deyang Shangdong Electrical Equipment Co. , Ltd. (formerly Deyang Ruihua Electrical Equipment) is a high-tech enterprises, focusing on research, development, design, manufacture of special electrical equipment, heavy-duty, lifting equipment, constant pressure water supply, sewage treatment environmental protection energy-saving, machine tools, construction, hydraulic lubrication equipment and based on PLC, man-machine interface, industrial computer platform data processing system automation control.