The first effective surface area determines the magnitude of the peak fluid pressure in the selected second force transmitting {HEAD ~ mechanism} and {TAIL ~ the downstream conduit} 
The first effective surface area determines the magnitude of the peak fluid pressure in the selected second force transmitting { HEAD ~ mechanism } and { TAIL ~ the downstream conduit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL