nkowa nkenke:

teepu ọla kọpa na-ezo aka na mpempe ọla kọpa dị mkpa, nke ejiri nrapado na-akwadokarị.Enwere ike ịhụ teepu ọla kọpa n'ọtụtụ ngwaike na ụlọ ahịa ihe ubi na mgbe ụfọdụ ụlọ ahịa eletrọnịkị.A na-eji teepu ọla kọpa mee ka slugs na slugs pụọ n'akụkụ ụfọdụ n'ubi, ihe ọkụkụ, na ogwe osisi osisi na-amị mkpụrụ, na osisi na osisi ndị ọzọ.A na-ejikwa ya maka ngwa ndị ọzọ, dị ka ihe mkpuchi electromagnetic ma ọ bụ eriri nnyefe elu dị ala na ngwá electronic na mmepụta nke oriọna tiffany.[citation need] Ọ ​​na-abịa n'ụdị abụọ;ihe nrapado na-eduzi na nke na-adịghị eme ihe (nke na-emekarị).