Ndi oyenera kuwotcherera zidutswa woonda wa kuponyedwa chitsulo kuwotcherera ndi pamalo Machining, monga mitu yamphamvu, zofunika imvi kuponyedwa zitsulo injini midadada, mabokosi zida, ndi Machine Chida ndipo posachedwapa.
Ndioyenera kuwotcherera chitsulo champhamvu kwambiri cha imvi ndi chitsulo chosungunuka, monga silinda, chipika cha injini, bokosi la gear, ndi zina.