{HEAD ~ a positive displacement pump} located below said {TAIL ~ containers} and having an inlet and an outlet, the outlet being connected to a nozzle; and 
located below
{ HEAD ~ a positive displacement pump } located below said { TAIL ~ containers } and having an inlet and an outlet , the outlet being connected to a nozzle ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH