Here, such locking elements are struts coupled to the body of the tube to be movable between radially inner positions at which they will pass through such hole and radially outer positions at which they cooperate with the flange means to secure {HEAD ~ the tube} to {TAIL ~ such wall} as described above 
to
Here , such locking elements are struts coupled to the body of the tube to be movable between radially inner positions at which they will pass through such hole and radially outer positions at which they cooperate with the flange means to secure { HEAD ~ the tube } to { TAIL ~ such wall } as described above
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