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