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Shenzhen Tsinghua Tellhow Sci-tech specializes in the design and manufacture of CCTV and speak multimedia equipment. We are one of the largest exporters of security and speaker products in China. Our CCTV range includes CCD cameras, day/night cameras, dome cameras, IR waterproof cameras, CCD zoom cameras, wireless AV receivers and PC cameras.Our co***ny was certificated ISO9001 in Mar.2003.With the good quality of products and the perfect service after sale, Our speaker assembly factory has been equipped wi...
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