Such symmetrical elements are found in building {HEAD ~ blocks} that may be used in {TAIL ~ the present disclosure} 
used in
Such symmetrical elements are found in building { HEAD ~ blocks } that may be used in { TAIL ~ the present disclosure }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL