... NSK bearing 4.Vacuum nitriding gear. 1.marble grinding and polishing machine 2.siemens motor ,delta convertor3.NSK bearing4.Vacuum ... millstones can do the replace, grinding, polishing, crystallization, cleaning.3. Folding design and separate, reduce the burden of handling balanceTechnical ... ×60 The disc Available abrasive. The handle of machine:360 degree is available to turn.The certification of ...