{HEAD ~ The input end} 411 of {TAIL ~ the heating mechanism} 41 is connected with a power source end 421 and the collector of the transistor 422 
of
{ HEAD ~ The input end } 411 of { TAIL ~ the heating mechanism } 41 is connected with a power source end 421 and the collector of the transistor 422
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH