{HEAD ~ A hollow plastic dilator} 60 is then passed through {TAIL ~ passage} 11 of the cannula housing and is slid over guide 61 
is passed through
{ HEAD ~ A hollow plastic dilator } 60 is then passed through { TAIL ~ passage } 11 of the cannula housing and is slid over guide 61
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH