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