nkhani

Pa mndandanda womwewo wa makina opera ufa, ufa wochokera kumagulu awiri a mphero ndi wabwino kuposa ufa wogayidwa ndi gulu limodzi.
M’kati mwa mphero, mphero ziwirizi zimakhala ndi ntchito zosiyanasiyana, imodzi ndi yopera tirigu, ndipo ina ndi yopera pakati pa tirigu.Ngati gulu limodzi lokha la mphero litengedwa, mpheroyo imagwiritsidwa ntchito popera chimanga ndi pachimake pa nthawi imodzi.Choncho, teknoloji yopangira ma seti awiri a mphero ndi yabwino, ndipo poyerekeza, ufa uli ndi kukoma kokoma ndi mtundu.