... -head polishing machine JS-550A Market position: We are manufacturer for medium-to-high grade floor ... , repair, and new floor applying, etc.2. On floor surfaces covering concrete, epoxy, stone, marble, granite, terrazzo, etc ... longer life. 5. One-body steel or aluminum alloy gearbox, thicker panel than others in ... when working under dry condition. 11. Alloy water switch, which is beautiful and strong. 12. ...