{TAIL ~ A catalyst carrier} including a ceramic block having {HEAD ~ two open faces}, an outer peripheral surface, and multiple cells divided by a cell wall and extending between the open faces 
{ TAIL ~ A catalyst carrier } including a ceramic block having { HEAD ~ two open faces } , an outer peripheral surface , and multiple cells divided by a cell wall and extending between the open faces
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH