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