a rotatable drum including a plurality of outer compartments for the cellulose pulp to be washed, said plurality of outer compartments defined by axial compartment walls distributed along {HEAD ~ the circumference} of {TAIL ~ said rotatable drum}, 
of
a rotatable drum including a plurality of outer compartments for the cellulose pulp to be washed , said plurality of outer compartments defined by axial compartment walls distributed along { HEAD ~ the circumference } of { TAIL ~ said rotatable drum } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH