means operatively connected to said heating elements and said {HEAD ~ control} means for supplying {TAIL ~ power} to said heating elements 
for supplying
means operatively connected to said heating elements and said { HEAD ~ control } means for supplying { TAIL ~ power } to said heating elements
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH