a second pressure regulator in communication with {TAIL ~ said second reservoir} for controlling pressure supplied through said pressure supply conduit to said {HEAD ~ second reservoir} 
a second pressure regulator in communication with { TAIL ~ said second reservoir } for controlling pressure supplied through said pressure supply conduit to said { HEAD ~ second reservoir }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD