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Contact us Optics Application Co., Ltd. Add: Room 105, Block 2, No. 12 Changsheng Road, Science and Technology Park, Changping District, Beijing 102200,China. Tel: 86-10-6291 3801 18515286999 13801244192 Fax: 86-10-6291 5591 E-mail: szg@opticsapp.cn, sales@opticsapp.cn |