Zaɓuɓɓukan ƙarfe iri-iri iri-iri - fitar da vanes a baya da gaba (akan masu rufaffiyar rufaffiyar) rage sake zagayawa a cikin famfo, da kuma taimakawa hana gurɓacewar hatimi - zaɓin simintin gyare-gyare na madaidaiciya ko ɓangaren francis vanes (daga 2 zuwa 8 vanes akan wasu masu girma dabam) tayin. fadi da zažužžukan na'ura mai aiki da karfin ruwa a cikin girma guda.