Onani ma valve akuluakulu a mafakitale akhalapo kwa zaka zopitirira zana.Pamene ntchito zikuchulukirachulukira komanso zovuta, ma valve asintha kukhala mitundu isanu ndi inayi kuti igwirizane ndi zofunikira zosiyanasiyana.Mitundu 9 iyi imakhudza ntchito zonse zamafakitale ndi ntchito.Kugawika kwa ma valve kumatengera...
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