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