Sisitemu ya buji ya sisitemu
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Akayunguruzo ka buji
Buji ya buji ifite ibintu byinshi byungurura ibintu imbere mumazu, bizagira itandukaniro ryumuvuduko nyuma yo kuyungurura. Nyuma yo gukuramo amazi, cake yo kuyungurura irapakururwa no gusubira inyuma kandi ibintu byo kuyungurura birashobora kongera gukoreshwa.