求翻译：是一家以开关电源及电动车充电器产品的科研、开发、生产为支柱的专业化企业。并且连年被天长市认定为“高新技术”企业。是什么意思？

Is a switching power supply and electric car charger products research, development and production of specialized enterprises for the pillar. And successive years Tianchang identified as "high-tech enterprises.

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Is one take the switching power supply and the electric car battery charger product scientific research, the development, the production as the prop specialized enterprise.And successive years by the day long city was recognized is “the high technology and new technology” the enterprise.

Is a switch mode power supply and electric vehicle charger product research, development, production of specialized enterprise to pillars. And has been in tianchang city identified as "high-tech" business.

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