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