Seal 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 ... .simple in structure, easy coperation, economical and parctical.FP Dish Polishing/Seal head polishing Machine Specification:ModelExternal rangeInner rangePlate’s loading weightPlate’s diameterFP-250 ...