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