... 2.It can replace the ginding machine 3.Very easy operate Surface concrete grinding machine GuoYun founded in 1990,it ... lathe,vertical lathe,grinding machine,boring lathe,facing machine,spherical lathe Improve the metal surface roughness,the Ra value ... reduced and the fatigue strength improved.6, ShanKePing polished,the metal surface friction resistance greatly reduced, self antifraying extended, ...