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Kayayyaki

Ana amfani da zoben ciki a matsayin hanyoyin tsere masu birgima inda shaft ɗin bai dace da wannan dalili ba, zoben ciki suna da ƙanƙanta sosai saboda ƙarancin tsayin sashin radial ɗinsu. Waɗannan zoben ciki an samar musu da chambers na gubar.