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Fibra ottica. Immagine creata con xfig gimp da Paulatz per l'articolo Fibra ottica rilasciato in pubblico dominio it Fale CommonsHelper Paulatz it Opticalfiberreflectionangles svg Paulatz Original upload log page it Fibraottica Paulatz bytes no Immagine creata con xfig gimp da Paulatz per l'articolo Fibra Ottica rilasciato