Umuyoboro wangiritse uzwi kandi kwaguka kwaguka no kwaguka, bikoreshwa cyane cyane kugirango imiyoboro ikorwe.Indishyi ya Bellows ni igikoresho cyoroshye, kizengurutse uruzitiro, rushyizwemo igikoresho gifite imikorere yo kwaguka, kigizwe n'inzogera z'ibyuma n'ibigize.Princi ikora ...
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