... head polishing machine for different enclosure ,sea head,dish head,range from 500mm~4000 mm diameter As a first manufacturer of tank polishing machine ... in China ,BOAO has the patent for almost ten years. We are prossional in polishing tanks,vessel,seal head ... and parctical.FP Dish Polishing/Seal head polishing Machine Specification:ModelExternal rangeInner rangePlate’s loading ...