Igikombe kizunguruka umutwe rivet umutwe: nyuma yo kuzunguruka, twakagombye kumenya ko umutwe wibanze udashobora gukurwa kumubiri.
Impamvu: kubera ko diameter yumutwe wimisumari ari nini cyane; umubiri uzunguruka ni mugufi, bikavamo kudahuza nubunini bwikurikiranya.
Igikombe cyuzuye ibyuma ni ubwoko bwimbaraga zikomeye zikoreshwa cyane mumabati yamashanyarazi, inganda, ninganda zimodoka.Ubuso bufite ibara ry'ubururu, butangiza ibidukikije,
Kohereza ibicuruzwa muri Vietnam, Tayilande, Lativiya no mu bindi bihugu kandi twatsindiye icyarimwe.
Igihe cyo kohereza: Mutarama-29-2021