Ayyukan jujjuyawar silinda guda biyu - ana yin aiki ta hanyar iska, gami da samun iska a kunne, kashewa da ajiye matsayi;
Ayyukan canzawa guda ɗaya- shine aikin buɗaɗɗen iska, kuma aikin kusa shine dawowar bazara: Single{1}}aikin: nau'in buɗaɗɗen al'ada (N/O) da nau'in rufewa (N/C). Nau'in buɗewa na yau da kullun: kashe iska, buɗewa; Nau'in rufaffiyar al'ada: buɗaɗɗen iska, rufewa.
