Shanghai Rui Jin-Frequency Power Supply Technology Co., Ltd. is a collection development, production, sales and service in one of professional manufacturer of inverter power supply, the main produce various kinds of Shanghai inverter power supply, 60HZ inverter power supply, three-phase inverter power supply, single-phase inverter power supply, shore electric power, medium frequency power supply, regulated power supply transformers and other products.'s advanced production technology imported from Japan, and in line with new design concepts, services, digital communications in the world.'s the full implementation of customer satisfaction projects, set up a technically proficient after-sales service team to provide our clients with quality service, in order to solve your worries and provide OEM manufacturing services, Welcome your patronage!