establishing a signal, {HEAD ~ PMIN}, representing {TAIL ~ a predetermined minimum output power} produced by said second motor generator set, 
establishing a signal , { HEAD ~ PMIN } , representing { TAIL ~ a predetermined minimum output power } produced by said second motor generator set ,
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH