... dual-head polishing machine JS-550A Market position: We are manufacturer for medium-to-high grade floor polishing machines with ... , polishing, renovation, restore, repair, and new floor applying, etc.2. On floor surfaces covering concrete, epoxy, stone, marble, granite, terrazzo, etc ... (); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); JS-550 dual-head concrete floor polishing machine