Thus, {HEAD ~ the pipeline circuit} 12A, the pipeline circuit 12B, and the pipeline circuit 12C are {TAIL ~ redundant versions} of the same pipeline circuit 
are
Thus , { HEAD ~ the pipeline circuit } 12A , the pipeline circuit 12B , and the pipeline circuit 12C are { TAIL ~ redundant versions } of the same pipeline circuit
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH