{HEAD ~ a reservoir} connected in common to {TAIL ~ said flow systems} to receive a flow of fluid from each said system 
connected in common to
{ HEAD ~ a reservoir } connected in common to { TAIL ~ said flow systems } to receive a flow of fluid from each said system
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH