{HEAD ~ Portions} of {TAIL ~ the circuits} are bonded together and electrical connections between the bonded portions are formed 
of
{ HEAD ~ Portions } of { TAIL ~ the circuits } are bonded together and electrical connections between the bonded portions are formed
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH