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       长沙广义变流技术有限公司成立于2005年10月，位于国家级长沙经济技术开发区中部智谷产业园，是集产品研发、生产、销售、服务于一体的高新技术企业，主要产品是轨道交通车载辅助变流器，包括逆变电源、充电机、DC/DC变流器等。       

      公司完全掌握轨道交通车载变流系统的核心技术，产品均具有自主知识产权，技术先进性、自主创新能力和产品质量均居国内同行业领先地位。得益于中国轨道交通车辆技术的不断创新实践，公司在中频中功率产品领域更是处于国际领先地位。

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O&C Electric Technique Co.,Ltd, founded in Oct 2005, locates in the Core Power Industry park of Changsha National Economic and Technical Development Zone, P.R China.of business operation space and integrated with R&D, manufacture, sales and service functions. OCET is edicated on providing converter solutions for the Railway Industry, product covers Auxiliary converter, power supply inverter, battery charger, DC/DC converter etc.

OCET fully owns the core technology of the converter system for Rolling Stock. The intellectual property rights, independent innovation capacity and high quality product made OCET the pioneer in the rail industry. Benefit from the remarkable advances that Chinese rail transportation vehicle technology has made, OCET developed its leading strength in medium frequency, medium voltage and medium power converter filed.