The drape comprises a pair of {TAIL ~ stacks} of {HEAD ~ panels} which are folded around parallel fold lines 
The drape comprises a pair of { TAIL ~ stacks } of { HEAD ~ panels } which are folded around parallel fold lines
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH