{HEAD ~ Two way outdwelling slit valving} of {TAIL ~ medical liquid} flow through a cannula and methods 
of
{ HEAD ~ Two way outdwelling slit valving } of { TAIL ~ medical liquid } flow through a cannula and methods
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH