Ibyuma bitagira umuyonga bikozwe mubyuma bidafite ingese bishyushye cyangwa byahimbwe. Ibyuma bitagira umuyonga mubisanzwe bigaragazwa na diameter kandi bifite uburyo bwinshi bwo gukoresha, harimo peteroli, ibikoresho bya elegitoroniki, imiti, imiti, imyenda, ibiryo, imashini, ubwubatsi, ingufu za kirimbuzi, aer ...
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