Urupapuro rwicyuma cyangwa u urupapuro rwicyuma, ni ibikoresho bisanzwe byubaka mubikorwa bitandukanye. Ikozwe mu byuma bya karubone, ikora nkigisubizo cyinshi kandi kirambye cyo kugumana inkuta, ubucukuzi bwigihe gito, cofferdams, nibindi byinshi bikoreshwa. Ingano ya U -...
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