A reservoir 1, wherein the tank comprises a high portion in communication with the at least one oil outlet conduit and {HEAD ~ a low portion} in {TAIL ~ communication} with the at least one oil inlet conduit 
in
A reservoir 1 , wherein the tank comprises a high portion in communication with the at least one oil outlet conduit and { HEAD ~ a low portion } in { TAIL ~ communication } with the at least one oil inlet conduit
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH