Pamtundu wa muyezo, kukhazikitsa mayunitsi ogulitsa 1 ndi 2 musanakweze wolamulira.
Pamalo ofananira, cholumikizira cholembedwacho chidakhazikitsidwa kale. Chifukwa chake, zokhazikitsidwa izi ndizosafunikira. (Osasintha ndi mayunitsi ena otulutsa.)
Mukakhazikitsa mayunitsi, tajambula makina amkati kuchokera kunyumba ndi kuyikamo ma utoto otulutsa mu manyuzipepala olamulira 1 ndi 2.