The structural segments are then assembled to form {HEAD ~ sub structures} which are then assembled to form {TAIL ~ the completed structure} such as a geodesic dome structure 
are assembled to form
The structural segments are then assembled to form { HEAD ~ sub structures } which are then assembled to form { TAIL ~ the completed structure } such as a geodesic dome structure
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH