An ampule is molded with an enlarged nozzle and {HEAD ~ a separate orifice} is installed in {TAIL ~ the ampule} to provide the desired nozzle opening 
is installed in
An ampule is molded with an enlarged nozzle and { HEAD ~ a separate orifice } is installed in { TAIL ~ the ampule } to provide the desired nozzle opening
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH