Shenzhen Hanwei Gangtai Jewelry Machine Co.ltd. was found in 1992.Ater several years of hard working , it accumulated plenty of ecperiences in producing and operating, and it has already turned into a great incorporate bijouterie company which ahs professional design exploitation , producing, machining wholesale and retail. Our R&D department are studying advance technology to keep our product on top range .our GTZL-300 Plasma Automatic Welding & Making Machine , High-speed chain making machine series are gained a series of Technology Patet Certificates in Succession. we are specilized in Jewelry Machine , 316L stainless steel chain , 925 Silver Chain