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