Another feature of the present invention is that {HEAD ~ the weakened portion} of the seal or member separating the two reagents is located to direct {TAIL ~ one reagent} toward the other 
Another feature of the present invention is that { HEAD ~ the weakened portion } of the seal or member separating the two reagents is located to direct { TAIL ~ one reagent } toward the other
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH