piercing at least two transversely spaced apertures in an elongated sheet of {HEAD ~ heat conducting}, {TAIL ~ deformable material} 
piercing at least two transversely spaced apertures in an elongated sheet of { HEAD ~ heat conducting } , { TAIL ~ deformable material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL