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