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