a housing having a first dispensing conduit for dispensing said first component and {HEAD ~ a second dispensing conduit} for dispensing said {TAIL ~ second component} 
for dispensing
a housing having a first dispensing conduit for dispensing said first component and { HEAD ~ a second dispensing conduit } for dispensing said { TAIL ~ second component }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL