Nevertheless, the compressing step is performed after {TAIL ~ the other end} 12 of {HEAD ~ the heat pipe} 1 is sealed 
Nevertheless , the compressing step is performed after { TAIL ~ the other end } 12 of { HEAD ~ the heat pipe } 1 is sealed
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH