We are XRF equipment supplier located in Nanjing, China. have our own research engineers and workshops. delicate ourselves to the field of product development. now professional assaying contents jewelry samples. And we series products which applicate checking ...

Shenzhen 3 watches Co., Ltd was founded in 2006, since its establishment, wide set of professionals, the introduction advanced production equipment and technology, constantly develop innovate, gradually formed a developed, design, manufacture excellent after sale service for one-stop ...