second pressure transducer means for measuring {HEAD ~ the pressure} in {TAIL ~ the second accumulator chamber} and providing an output signal indicative thereof 
second pressure transducer means for measuring { HEAD ~ the pressure } in { TAIL ~ the second accumulator chamber } and providing an output signal indicative thereof
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH