Referring to FIGS 2 and 3, the lumens 18,20 share a common wall 26, which extends entirely from the base 14 to {HEAD ~ the distal end} 28 of {TAIL ~ the dual duckbill valve} 
of
Referring to FIGS 2 and 3 , the lumens 18,20 share a common wall 26 , which extends entirely from the base 14 to { HEAD ~ the distal end } 28 of { TAIL ~ the dual duckbill valve }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL