{HEAD ~ Power generator} 26 and second power generator 28 may provide {TAIL ~ equal power} or may provide different power amounts  
{ HEAD ~ Power generator } 26 and second power generator 28 may provide { TAIL ~ equal power } or may provide different power amounts
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH