Meanwhile will be given the answer to "accurate" (circles) - by the demonstration, how the electric discharge(s) are able to create a very accurate circles, only by mechanical effect (photo 1), author's own experiment.
Wakati huo huo atapewa jibu "sahihi" (duru) - kwa maandamano, jinsi kutokwa umeme (s) ni uweza wa kujenga duru sana sahihi, tu athari mitambo (picha 1), mwandishi mwenyewe majaribio.