drawing a carbon nanotube film from {TAIL ~ a carbon nanotube array} along {HEAD ~ a first direction} 
drawing a carbon nanotube film from { TAIL ~ a carbon nanotube array } along { HEAD ~ a first direction }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD