... .E),Automatic polishing machine .Feature of the polishing machine :1.Using cloth emery disc , low cost and high efficient ,mirror polished .2.Frequency speed control ,high quality .3 ... .Roughness as 0.1 um4.Speed : 8m2/ h5.Automatic polishing machine .Machine advantages:1,Easy-handing and safety.2,Advantage design.3,Almost full automatic ...