{HEAD ~ A first pressure regulator}, also in communication with the first reservoir, controls the pressure supplied through the pressure supply conduit to the first reservoir and a second pressure regulator, also in {TAIL ~ communication} with the second reservoir, controls the pressure supplied through the pressure supply conduit to said second reservoir 
in
{ HEAD ~ A first pressure regulator } , also in communication with the first reservoir , controls the pressure supplied through the pressure supply conduit to the first reservoir and a second pressure regulator , also in { TAIL ~ communication } with the second reservoir , controls the pressure supplied through the pressure supply conduit to said second reservoir
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH