FIG 6a illustrates the relationship between tubular member 28 and structural conduit 22 when {HEAD ~ structural conduit} 22 is not tensioned by {TAIL ~ external factors} 
is not tensioned by
FIG 6a illustrates the relationship between tubular member 28 and structural conduit 22 when { HEAD ~ structural conduit } 22 is not tensioned by { TAIL ~ external factors }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL