{HEAD ~ 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 the at least one oil inlet conduit 
wherein
{ HEAD ~ 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 the at least one oil inlet conduit
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL 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 OTH OTH OTH OTH OTH OTH OTH