{HEAD ~ The tank} includes {TAIL ~ a part} connected to the oil outlet conduit and a lower part connected to the oil inlet conduit 
includes
{ HEAD ~ The tank } includes { TAIL ~ a part } connected to the oil outlet conduit and a lower part connected to the oil inlet conduit
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH