CHANGAI Electronic Science & Technology Co., Ltd is a high-tech corporation that specialized in studying, developing, producing and selling aluminum enclosures, electrical electronic industrial boxes, instrumented case systems, high quality gas sensors, analyzers systems ...

YUEQING HEYUAN ELECTRONIC TECHNOLOGY CO.,LTD. established in 2009, is a professional manufacturer focuses on the research, development, production, sale and service of power supply products. such as voltage regulator,UPS,switching supply,power inverter,solar system,transformer. We ...