In {HEAD ~ this mid plane} addressing or triggering {TAIL ~ configuration}, the sustain function is performed by the two sustain electrodes as in the co planar configuration, and the address or trigger function is performed between at least one of the sustain electrodes and the address electrode 
In { HEAD ~ this mid plane } addressing or triggering { TAIL ~ configuration } , the sustain function is performed by the two sustain electrodes as in the co planar configuration , and the address or trigger function is performed between at least one of the sustain electrodes and the address electrode
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH