In all disclosed embodiments of the tube, such struts are integral with the tube body and project into apertures formed therein as {HEAD ~ extensions} of {TAIL ~ such body} 
of
In all disclosed embodiments of the tube , such struts are integral with the tube body and project into apertures formed therein as { HEAD ~ extensions } of { TAIL ~ such body }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL