it is applicable to the grinding and the process of more than 290 material,non-flammable and non-exposible material, it 's appliable to the grinding and the prosessing of more than 280 non-fammable and non-explosive material with hardness less than 7 and humidity less than 6% in mining,construction,chemical industry,or metallury such as clay,glass,limestone,marble,talcum,ect, it;s of stand ...