In this mid plane addressing or triggering configuration, {HEAD ~ the sustain function} is performed by {TAIL ~ 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 this mid plane addressing or triggering configuration , { HEAD ~ the sustain function } is performed by { TAIL ~ 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 OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL 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