... . Ball Pressing Machine can be used to suppress coal , iron , coke , aluminum powder, iron , iron oxide skin, toner , toner , slag , gypsum, tailings , ... working principle is that the two vice-roll pre-suppress materials in the form of pipeline to lay a solid foundation for ... . Loose on the local materials, such as coke, iron skin, dust powder effects of sludge and other materials is very obvious. Our ...