Since its founding in 1982, Beijing Union Opto-Electronic Technology Co., Ltd. has been devoting itself in research, development and service of analytical instruments.

北京优联光电技术有限公司自1982年成立以来一直致力于分析仪器基础产业的研究、开发及服务性工作。

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CONTEC MEDICAL SYSTEMS CO. , LTD (hereinafter referred to as CONTEC) focusing on research, manufacture and distribution of medical instruments, was founded in 1992 as a high-tech company.

秦皇岛市康泰医学系统有限公司成立于1992年，是专业从事电子医疗仪器研发、生产和销售的高科技软件企业。

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YORK INSTRUMENT LTD is a high-tech company engaged in research & development, sales, service and maintenance of various instruments.

约克仪器公司是一家从事各类仪器仪表研发、销售、服务、维修的高科技公司。

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