The circuit systems {HEAD ~ 710A}, 710B may operate according to {TAIL ~ separate source potentials} and separate grounds 
The circuit systems { HEAD ~ 710A } , 710B may operate according to { TAIL ~ separate source potentials } and separate grounds
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH