The difference signal thus obtained from the subtracting section is integrated in {HEAD ~ a difference} integrating {TAIL ~ section} for each interval and is then supplied to a discriminating section 
integrating
The difference signal thus obtained from the subtracting section is integrated in { HEAD ~ a difference } integrating { TAIL ~ section } for each interval and is then supplied to a discriminating section
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH