An output terminal of {HEAD ~ the trigger} 143 is connected to the base electrode of {TAIL ~ the sixth transistor} 144 
An output terminal of { HEAD ~ the trigger } 143 is connected to the base electrode of { TAIL ~ the sixth transistor } 144
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH