One feature of the system illustrated is that {HEAD ~ power generator} 26 is utilized to supply {TAIL ~ a certain quantity} of power, while second power generator 28 supplies another quantity 
is utilized to supply
One feature of the system illustrated is that { HEAD ~ power generator } 26 is utilized to supply { TAIL ~ a certain quantity } of power , while second power generator 28 supplies another quantity
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH