we a professional R & D sapphire (Al2O3), quartz, tungsten carbide and other hard and brittle materials and related special gem components, machining , sales and import and export trade of high-tech enterprises; have sapphire outstanding professional technical team and advanced processing equipment, master sapphire and optics production and processing core technology and improved manufacturing processes, customers can provide a large number of long-term, stable sapphire and other optical devices...
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