This adds {HEAD ~ once more additional strength} to {TAIL ~ the structure} without interfering with the above described basic function 
to
This adds { HEAD ~ once more additional strength } to { TAIL ~ the structure } without interfering with the above described basic function
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH