We have numbers of utility model patent，for example：The invention relates to graphite mold for electronic sintering （No.:20713601）; Invention relates to graphite mold for Up-drawing crystallizer（No.:20399955）;Invention relates to novel graphite rotor component（No.:20403420)......and so on,we have nearly 20 items of ZL.With the business concept of "innovation and perfection", we constantly improve our ability to manufacture and innovation, promote SKWJ brand, and serve our customers sincerely.