Vavu
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valavu yachitsulo chosapanga dzimbiri
Valve ndi gawo lowongolera pamapaipi operekera madzimadzi.Amagwiritsidwa ntchito kusintha gawo la mayendedwe ndi njira yapakati.Lili ndi ntchito zosokoneza, kudula, kugwedeza, cheke, shunt kapena kuchepetsa kupanikizika kwa kusefukira.