stretching the carbon nanotube film along a second direction substantially perpendicular with {HEAD ~ the first direction} to obtain {TAIL ~ a stretched carbon nanotube film}, wherein step comprises the substeps of: 
stretching the carbon nanotube film along a second direction substantially perpendicular with { HEAD ~ the first direction } to obtain { TAIL ~ a stretched carbon nanotube film } , wherein step comprises the substeps of :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH