{HEAD ~ a shunt} excited ac generator subject to widely varying drive speeds, including {TAIL ~ a shunt field} ; comprising 
including
{ HEAD ~ a shunt } excited ac generator subject to widely varying drive speeds , including { TAIL ~ a shunt field } ; comprising
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH