... Siemens motor 4)Efficiet concrete edge grinder floor grinding and polishing machine JS-550B Market position: We are manufacturer for medium- ... floor applying, etc.2, On floor surfaces covering concrete, epoxy, stone, marble, granite, terrazzo, etc.3, Under condition both dry ... normally upon MOQShipping port: Shanghai, ChinaQuantity discount: availablePictures: JS-550B four heads floor grinder machine