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