Crank kuguruka

Ibikoresho by’isosiyete bikoreshwa cyane cyane mu ruganda ruzunguruka, ibikoresho birashobora kubyara akabari, insinga, ibyuma, ibyuma byangiza, umusaruro uva kuri toni 10,000 / umwaka ukagera kuri toni 500.000 / umwaka ：