Kugirango moteri ikore neza, hagomba kubaho umwuka uhagije uhumeka. Niba umwuka wangiza ibikoresho bya moteri (umukungugu, colloid, alumina, fer acide, nibindi) uhumeka, umutwaro kuri silinderi no guteranya piston uziyongera, bikaviramo kwambara bidasanzwe bya silinderi hamwe na piston ikoranya ...
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