Kurwanya amashanyarazi gusudita, imiyoboro ya Erw ibyuma bikozwe nubukonje bwimikorere yicyuma mumiterere ya silindrike. Amashanyarazi yibyuma, azwi kandi ku izina rya erw asukuye, akoreshwa cyane mu nganda zinyuranye kubera guhinduranya no kuramba. Iyi miyoboro ni m ...