... coal powder:1000-10,000kg/h 3.Shape: ball, oval,pillow... Double-roll type press machine:This machine is specially ... When the material to the two rollers rotating line contact point, the pressure of materials has reached the peak. ... products:Egg-shaped ball, oval-shaped ball, circular-shaped ball, square-shaped ball, columnar-shaped ball, banding-shape ball, cake-shaped ball, etcTechnical Data: ...