The roller receives {TAIL ~ the heat emission part} and has at least one opening to provide {HEAD ~ heat} to a target  
The roller receives { TAIL ~ the heat emission part } and has at least one opening to provide { HEAD ~ heat } to a target
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH