The dielectric material has {HEAD ~ a polygonal shape} including a front face and {TAIL ~ a bottom face} 
including
The dielectric material has { HEAD ~ a polygonal shape } including a front face and { TAIL ~ a bottom face }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL