Kwizirika ni ibikoresho bya mashini bikoreshwa muguhuza, gutunganya, cyangwa gufunga ibice, kandi bikoreshwa cyane mumashini, ubwubatsi, amamodoka, ikirere, nizindi nganda zikora. Ubwubatsi butandukanye nibikoresho bitandukanye muruganda, abiziritse barashobora kurinda umutekano, kwiringirwa, no gutuza ...
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