{HEAD ~ The PF} 34 receives {TAIL ~ exhaust} from the DOC 32 and filters any soot particulates present in the exhaust 
{ HEAD ~ The PF } 34 receives { TAIL ~ exhaust } from the DOC 32 and filters any soot particulates present in the exhaust
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH