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