Within {HEAD ~ the interior} of {TAIL ~ the tube}, one end of a flexible beam or wire is inserted into the supporting material 
of
Within { HEAD ~ the interior } of { TAIL ~ the tube } , one end of a flexible beam or wire is inserted into the supporting material
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