Ibicuruzwa

Byuzuye-byuzuye bya silindrike ya roller igizwe nimpeta zikomeye zo hanze ninyuma hamwe nizunguruka ziyobowe na rubavu. Kubera ko ibyo biti biranga umubare munini ushoboka wibintu bizunguruka, bifite ubushobozi buke cyane bwo gutwara imizigo, gukomera cyane kandi birakwiriye kubishushanyo mbonera.