Ulusi wa R25-R38
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Kubowola kwa batani la ulusi kumapangidwa ndi zitsulo zapamwamba za alloy ndi tungsten carbides. Kupyolera mu chithandizo cha kutentha, zida zathu zobowola zimakhala zolimba kuti zigwirizane ndi zofuna zobowola miyala ndipo zimataya mphamvu zochepa pobowola miyala. Kupatula apo, titha kupanga makonda obowola mabatani a ulusi molingana ndi momwe angabowole mosiyanasiyana, ndipo tizibowolo ta makonda timagwira ntchito pobowola mwala wofewa, mwala wotayirira komanso mwala wolimba.
