Kufotokozera Kwachidule:

Chokhuthala cha ng'oma chozungulira cha semi-centrifugal chimatha kusefa madzi omasuka pogwiritsa ntchito mphamvu yakunja. Chili ndi zofunikira kwambiri pa polima ndi mphamvu yomangirira ya matope. Poyerekeza ndi makina okhuthala a lamba, chokhuthala chathu cha matope chozungulira chingapereke matope okhuthala okhala ndi madzi ochepa. Madzi okhuthala okhala ndi madzi opitilira 1.5% ndi chisankho chabwino.