Both the flow through honeycomb substrate 200 and {HEAD ~ the wall flow particulate filter} 300 include {TAIL ~ honeycomb substrates} having channels, as will be further explained below 
Both the flow through honeycomb substrate 200 and { HEAD ~ the wall flow particulate filter } 300 include { TAIL ~ honeycomb substrates } having channels , as will be further explained below
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH