Brief introduction: Chinese factory, manufacture; +2000 case plants in China; Fineness: 100-325 mesh; Maintenance free system; Application: Choice for nonflammable and non-explosive minerals ( Moh’s hardness≤7 and moisture ≤ 6%), moisture content is less than 6%, for example: limestone, calcite, calcium carbonate, quartz, feldspar, calcite, talcum, barite, fluorite, Rare earth, marble, ceramic, ...