{HEAD ~ The reinforcing frame rib} extends around {TAIL ~ the entire casing} for fixing the casing in a predetermined form, whereby detrimental deformation of the casing , when washing the paper pulp at overpressure, is prevented 
{ HEAD ~ The reinforcing frame rib } extends around { TAIL ~ the entire casing } for fixing the casing in a predetermined form , whereby detrimental deformation of the casing , when washing the paper pulp at overpressure , is prevented
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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