The ceramic block has multiple honeycomb units combined by interposing an adhesive layer, where {HEAD ~ the honeycomb units} include {TAIL ~ an outer peripheral side honeycomb unit} and a center side honeycomb unit combined to form the outer peripheral part and the center part, respectively, of the block 
include
The ceramic block has multiple honeycomb units combined by interposing an adhesive layer , where { HEAD ~ the honeycomb units } include { TAIL ~ an outer peripheral side honeycomb unit } and a center side honeycomb unit combined to form the outer peripheral part and the center part , respectively , of the block
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL 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