wherein primary extrudate which exits through the primary slots is caused to buckle and form corrugated or cross directional cell walls to thereby form channels or cells which run generally at {HEAD ~ an angle} to the axis of extrusion and to {TAIL ~ the secondary extrudate} which exits through the straight cell slots forming straight cells 
to
wherein primary extrudate which exits through the primary slots is caused to buckle and form corrugated or cross directional cell walls to thereby form channels or cells which run generally at { HEAD ~ an angle } to the axis of extrusion and to { TAIL ~ the secondary extrudate } which exits through the straight cell slots forming straight cells
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 OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH