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SinoTech,Refractometer, Gem identify instrument, Fiber test microscope, Microscope, Caliper and o...
Sino Science & Technology Co., Ltd. located in Zhangzhou, which is a small, beautiful and calm city in CHINA mainland! We began our optical instruments business from 2001, having a factory with 3300 meter squares,5 experts in optical and electronic designs. We have tens of patents of refractometer, microscope and gemstone identify. SinoTech,Refractometer, Gem identify instrument, Fiber test...
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