A fuel filter has four of the cores arranged symmetrically about a longitudinal center line of {HEAD ~ a housing} to form {TAIL ~ a longitudinal flow passage} 
to form
A fuel filter has four of the cores arranged symmetrically about a longitudinal center line of { HEAD ~ a housing } to form { TAIL ~ a longitudinal flow passage }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL