1. Mbere ya byose, tekereza kumutekano wubwenge bufunze.Kugeza ubu, silinderi yo gufunga ku isoko igabanijwemo cyane cyane A, B, na C-urwego rwo gufunga silinderi, kuva intege nke kugeza zikomeye, nibyiza kugura silinderi yo mu rwego rwa C ifite ubwenge, buri ruhande rwurufunguzo rufite inzira eshatu, kandi biragoye cyane ku ...
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