The compressing step can be performed on {TAIL ~ the end} 11 of {HEAD ~ the heat pipe} 1 before the heat pipe 1 is vacuumed and filled with the working fluid 
The compressing step can be performed on { TAIL ~ the end } 11 of { HEAD ~ the heat pipe } 1 before the heat pipe 1 is vacuumed and filled with the working fluid
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH