... Siemens motor 4)Efficient JS-550 two heads floor grinding and polishing machine Market position: We are manufacturer for medium- ... :1. For grinding, polishing, renovation, restore, repair, and new floor applying, etc.2. On floor surfaces covering concrete, epoxy, stone, marble, granite, terrazzo ... init( { 'aImgSrc': aBigImageSrc } ); } )(); JS-550 two heads floor grinding and polishing machine