The first and second components, typically a thrombin solution and a fibrinogen solution, are dispensed in controlled proportions by adjusting the pressure regulators or by choosing {HEAD ~ an appropriate controlling bore size} for {TAIL ~ the flow} of liquids 
for
The first and second components , typically a thrombin solution and a fibrinogen solution , are dispensed in controlled proportions by adjusting the pressure regulators or by choosing { HEAD ~ an appropriate controlling bore size } for { TAIL ~ the flow } of liquids
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH