The ends of each set of {TAIL ~ resistors} are coupled together to form two neutral points which are electrically asymmetrical to each other because of the selection of resistors having {HEAD ~ different resistance values} of the assigned resistors 
The ends of each set of { TAIL ~ resistors } are coupled together to form two neutral points which are electrically asymmetrical to each other because of the selection of resistors having { HEAD ~ different resistance values } of the assigned resistors
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH