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