When {TAIL ~ the heat sink} is inserted into the computer, the heat pipe is disengaged from {HEAD ~ a heat source} 
When { TAIL ~ the heat sink } is inserted into the computer , the heat pipe is disengaged from { HEAD ~ a heat source }
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD