The fuel is passed over the cores and metal particles in {HEAD ~ passing} between the inlet and {TAIL ~ outlet} 
between
The fuel is passed over the cores and metal particles in { HEAD ~ passing } between the inlet and { TAIL ~ outlet }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL