... AND GRADING SYSTEM CAN BE CALSSFIED THREE SERIES: General Series , Specail Series, Single-Grading Series.Used range: It is widely used ... industries,such as metallurgy,chemical engineering,constructional materials,abrasive,coating,resin,fire proof materials,electrostatic coping carrier,ceramics, ... If having it,do not need others. CP series of supersonic superfine air flow milling and grading system