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