{HEAD ~ The signal} supplied to {TAIL ~ the light intensity control circuit D} is derived from the adder 9 
supplied to
{ HEAD ~ The signal } supplied to { TAIL ~ the light intensity control circuit D } is derived from the adder 9
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH