... custom-made; 2, Test at workshop with the customer. Coal , Ball Press Machine, OEM Manufacturer in China,20t/h1,Ball press machine: Ball press ... machine can press the raw materials for pelletize or press ball, such as coal dust, aluminum powder, active carbon, ... , chemical fertilizer, plastic, lime stone, pigment, urea, etc. 2,Ball Forming Machines working Principle This series of type pressure machine ...