Alternatively, if {HEAD ~ the area} of {TAIL ~ the openings} 45 is small, the heat emission part 20 is disposed such that one heat emission part 20 corresponds to a plurality of openings 45 
Alternatively , if { HEAD ~ the area } of { TAIL ~ the openings } 45 is small , the heat emission part 20 is disposed such that one heat emission part 20 corresponds to a plurality of openings 45
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH