The plumbing may be combined with {HEAD ~ the surge bleed system} to simplify the systems and reduce weight and {TAIL ~ cost} 
to reduce
The plumbing may be combined with { HEAD ~ the surge bleed system } to simplify the systems and reduce weight and { TAIL ~ cost }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH REL OTH OTH TAIL TAIL TAIL TAIL TAIL