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