The barrier is furthermore spaced radially away from the central portion or stem of the insulator over at least a substantial part of {HEAD ~ the inner periphery} of {TAIL ~ the barrier} 
of
The barrier is furthermore spaced radially away from the central portion or stem of the insulator over at least a substantial part of { HEAD ~ the inner periphery } of { TAIL ~ the barrier }
OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL