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Ubwoko bwa UZ umwirondoro ushyushye uzengurutsa urupapuro
Ikirundo cy'icyuma ni ubwoko bw'icyuma gifunze, kandi igice cyacyo kigororotse, kigororotse kandi kimeze nka Z, kandi gifite ubunini butandukanye.
n'impapuro zifatika.Ibisanzwe ni Larson, Lackawanna nibindi.
Ibyiza byayo ni: imbaraga nyinshi, byoroshye gutwara mubutaka bukomeye;irashobora kubakwa mumazi maremare, nibiba ngombwa, ongeramo inkunga ihindagurika kugirango ube akazu.Imikorere myiza idafite amazi;Irashobora gukora cofferdams yuburyo butandukanye nkuko bisabwa, kandi irashobora gukoreshwa inshuro nyinshi, bityo ikoreshwa cyane.