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