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