However, {HEAD ~ both current sources} 47, 49 share {TAIL ~ the same leads} for current return, i.e., the leads depicted as columns in the array 
share
However , { HEAD ~ both current sources } 47 , 49 share { TAIL ~ the same leads } for current return , i.e. , the leads depicted as columns in the array
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH