Various heating systems like {TAIL ~ convection}, conduction, contact and {HEAD ~ radiation heating} can be used 
Various heating systems like { TAIL ~ convection } , conduction , contact and { HEAD ~ radiation heating } can be used
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH