A fibrous filter element for trapping diesel engine exhaust particulates comprises {TAIL ~ a mass} of {HEAD ~ coiled wire} of flattened cross section compacted into a small passage gas pervious body 
A fibrous filter element for trapping diesel engine exhaust particulates comprises { TAIL ~ a mass } of { HEAD ~ coiled wire } of flattened cross section compacted into a small passage gas pervious body
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH