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