Water tank automatic water-supplying cooling system 2.2kw spindle power special in stone and marble engraving ... well-chosen electric accessories minimize the failure rate.2.Water tank and automatic water-supplying cooling system protect the tool effectively whileprocessing ... Artifical stones,Tombstones,Milestones,Ceramic,Glass and so on. 2.2 kw spindle power Stone Engraving Machine with water tank