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