Moni nonse, Tabwerera kuntchito ndipo zonse zabwerera mwakale, kupanga zinthu kukupitirira.
Popeza takonza zinthu zopangira chakudya chisanafike tchuthi, tsopano titha kupeza mosavuta mpaka 3000pc mkati mwa mwezi uno.
Tikhoza kupereka mafani a axial, mafani a centrifugal mokhazikika komanso mosavuta ngati mukufuna tsopano.
Nthawi yotumizira: Mar-02-2021