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For over 15 years, we have earned the confidence of our valued customers in providing security technology equipment & service in the USA. HEIVISION and It's parent co***ny: Best Surveillance System as well as its predecessor: Sitailong International Inc has been involved in the research and develpment of digital video technology since 1990's, the digital video surveillance systems developed & integrated by HEIVISON have been widely applied in banks, school, supermarket, office building, residential building...
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