{HEAD ~ A self sealing}, pressure openable, slit type valve may be mounted in {TAIL ~ the cover} at the dispensing orifice to control flow through the orifice 
{ HEAD ~ A self sealing } , pressure openable , slit type valve may be mounted in { TAIL ~ the cover } at the dispensing orifice to control flow through the orifice
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH