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