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