Pokonzekera chinthu chojambulira, chiyenera kukhazikika mu vise kuti zisasunthe.
Fayilo ndi ntchito ya manja awiri, kotero palibe njira yoti mmisiri wa pakhomo agwire ntchitoyo mokhazikika pokhapokha ngati vise ikugwiritsidwa ntchito.
Chophimba cha fayilo ndi chinthu chotetezera chomwe chimalepheretsa kuwonongeka kwa chinthu chomwe mukuchilemba pochisunga kuti zisagwirizane ndi nsagwada zolimba za vise.
