What is the advantage of drum pulper? A: efficiently scattered fibers B: dregs is also broken C: no break of dregs D: dregs are removed

What is the role of Plate screen after drum pulper? A: remove fine dregs B: further defibering C: remove coarse dregs D: concentrating

Please describe the principle of drum pulper. A: There are axial partitions in drum to bring pulp up, and then let them drop B: There is a stir in drum C: produce strong shear and rub of fibers D: produce mild shear and rub of fiber