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