a) Mukachotsa screw, palibe chifukwa chosuntha kapena kusokoneza chipangizo choyendetsera;

b) Mukachotsa chogwirira chapakati, palibe chifukwa chosuntha kapena kuchotsa screw;

c) Chotengera chapakati chikhoza kupakidwa mafuta popanda kusokoneza chidebe ndi chivundikiro.