He paura hiriwa paina iti, nekeneke;E rua paparanga conductive o te roughness mata paura hiriwa, conductivity pai;E toru nga rauemi whakakii conductive teitei, he pai te aukati ki te waikura.Ka whakamahia nuitia i roto i nga whakapiri hiko, nga hua hiko, te kawe hiko, te whakamarumaru hiko, te anti-huakita anti-huaketo.