Moreover, the base of the common wall 26 also forms a seal at the head of the device, thus preventing mixing of two components of a composition as {HEAD ~ the components} flow from {TAIL ~ passageways} into the lumens of the dual duckbill valve 
flow from
Moreover , the base of the common wall 26 also forms a seal at the head of the device , thus preventing mixing of two components of a composition as { HEAD ~ the components } flow from { TAIL ~ passageways } into the lumens of 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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH