{HEAD ~ The link apparatus} also contains {TAIL ~ circuits} for determining when a node has won arbitration over another node competing for time on the bus 
contains
{ HEAD ~ The link apparatus } also contains { TAIL ~ circuits } for determining when a node has won arbitration over another node competing for time on the bus
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH