{TAIL ~ Lateral ends} of {HEAD ~ each wrapping portion} are formed into a Z shape to produce the Z lock system 
{ TAIL ~ Lateral ends } of { HEAD ~ each wrapping portion } are formed into a Z shape to produce the Z lock system
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH