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