... , at the same time,it solved the technical problem of low foaming, high foaming,high filling, wear and corrosion.Nitride Case Depth0.5mm ... , small shear force, stable pressure , less wear and tear and low cost.3. Parallel twin-screw and barrel is widely used ... , at the same time, it solved the technical problem of low foaming, high foaming, high filling, wear and corrosion.Parallel twin screw and ...